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2018 United States Senate elections

The 2018 United States Senate elections were held on November 6, 2018. Among the 100 seats, the 33 of Class 1 were contested in regular elections while 2 others were contested in special elections due to Senate vacancies in Minnesota and Mississippi. The regular election winners were elected to 6-year terms running from January 3, 2019, to January 3, 2025. Senate Democrats had 26 seats up for election (including the seats of 2 independents who caucus with them), while Senate Republicans had 9 seats up for election.

2018 United States Senate elections

← 2016 November 6, 2018
November 27 (Mississippi runoff)
2020 →

35 of the 100 seats in the United States Senate
51 seats needed for a majority
  Majority party Minority party
 
Leader Mitch McConnell Chuck Schumer
Party Republican Democratic
Leader since January 3, 2007 January 3, 2017
Leader's seat Kentucky New York
Seats before 51 47
Seats after 53 45
Seat change 2 2
Popular vote 34,687,875 52,224,867[a][b]
Percentage 38.7% 58.2%
Seats up 9 24
Races won 11 22

  Third party
 
Party Independent
Seats before 2[c]
Seats after 2
Seat change
Popular vote 808,370[d]
Percentage 0.9%
Seats up 2
Races won 2

2018 United States Senate special election in Minnesota2018 United States Senate special election in Mississippi2018 United States Senate election in Arizona2018 United States Senate election in California2018 United States Senate election in Connecticut2018 United States Senate election in Delaware2018 United States Senate election in Florida2018 United States Senate election in Hawaii2018 United States Senate election in Indiana2018 United States Senate election in Maine2018 United States Senate election in Maryland2018 United States Senate election in Massachusetts2018 United States Senate election in Michigan2018 United States Senate election in Minnesota2018 United States Senate election in Mississippi2018 United States Senate election in Missouri2018 United States Senate election in Montana2018 United States Senate election in Nebraska2018 United States Senate election in Nevada2018 United States Senate election in New Jersey2018 United States Senate election in New Mexico2018 United States Senate election in New York2018 United States Senate election in North Dakota2018 United States Senate election in Ohio2018 United States Senate election in Pennsylvania2018 United States Senate election in Rhode Island2018 United States Senate election in Tennessee2018 United States Senate election in Texas2018 United States Senate election in Utah2018 United States Senate election in Vermont2018 United States Senate election in Virginia2018 United States Senate election in Washington2018 United States Senate election in West Virginia2018 United States Senate election in Wisconsin2018 United States Senate election in Wyoming
Results of the elections:
     Democratic gain      Republican gain
     Democratic hold      Republican hold
     Independent hold
     No election
Rectangular inset (Minn. & Miss.): both seats up for election

To maintain their working majority of 50 senators and their party's vice president's tie-breaking vote, Republicans could only afford a net loss of 1 seat in these elections. The Republicans had a 52–48 majority after the 2016 elections, but they lost a seat in Alabama in December 2017 after Jeff Sessions resigned to become U.S. attorney general and Doug Jones, a Democrat, won in the subsequent special election. Three Republican-held seats were open as a result of retirements in Tennessee, Utah and Arizona. Although every Democratic incumbent ran for re-election, Democrats faced an extremely unfavorable map, defending 26 seats, of which 10 were in states won by Donald Trump in the 2016 presidential election, and 5 of those where Trump had won by more than 10%. Republicans, however, only had to defend 9 seats, of which only 1 was in a state won by Hillary Clinton in 2016.

The Republicans increased their majority by defeating Democratic incumbents in Florida, Indiana, Missouri, and North Dakota; and holding the open seats in Tennessee and Utah. In contrast, Democrats won 2 Republican-held seats, defeating an incumbent in Nevada and winning the open seat in Arizona.

This was the first election cycle since 2002 in which the incumbent president's party gained seats in the Senate. The results for this election cycle were the only significant gains made by the Republicans in what was otherwise characterized as a "blue wave" election. The Republican gains in the Senate and the Democratic gains in the House marked the first mid-term election cycle since 1970 in which the president's party made net gains in one chamber of Congress while suffering net losses in the other,[3] which also occurred in 1914, 1962, and 2022. This was the first mid-term election cycle since 2002 in which any incumbents of the non-presidential party lost re-election. The number of defeated non-presidential party incumbents (4) was the most since the 1934 mid-terms.[4] As of February 2024, this is the last time Republicans either won control of the Senate and/or made net gains in the chamber.

Partisan composition edit

Among the 33 Class 1 Senate seats up for regular election in 2018, twenty-three were held by Democrats, two by independents who caucused with the Senate Democrats and eight by Republicans. Class Two seats in Minnesota and Mississippi held by interim appointees were also up for election; both incumbent appointees sought election to finish their unexpired terms.

Democrats targeted Republican-held Senate seats in Arizona (open seat) and Nevada.[5] Seats in Texas,[6] Mississippi (at least one of the two seats) and Tennessee (open seat)[7] were also competitive for the Democrats. Republicans targeted Democratic-held seats in Indiana, Missouri, Montana, North Dakota and West Virginia, all of which were won by Republicans in both the 2012 and 2016 presidential elections.[8] Seats in Florida, Ohio, Pennsylvania, Wisconsin and Michigan, all of which were won by Obama in 2008 and 2012 but by Trump in 2016, were also targeted by Republicans.[5][9] The Democratic-held seat in New Jersey was also considered unexpectedly competitive due to corruption allegations surrounding the Democratic incumbent.

The map was widely characterized as extremely unfavorable to Democrats, as Democrats were defending 26 states while Republicans were defending nine. Of these seats, Democrats were defending ten in states won by Donald Trump in the 2016 presidential election, while Republicans were only defending one seat in a state won by Hillary Clinton in 2016.[10][11][12] According to FiveThirtyEight, Democrats faced the most unfavorable Senate map in 2018 that any party has ever faced in any election.[13][14]

Results summary edit

Parties Total
Democratic Republican Independent Libertarian Green Other
Last elections (2016) 46 52 2 0 0 0 100
Before these elections 47 51 2 0 0 0 100
Not up 23 42 0 65
Class 2 (20142020) 11 20 0 31
Class 3 (20162022) 12 22 0 34
Up 24 9 2 35
Class 1 (2012→2018) 23 8 2 33
Special: Class 2 1 1 0 2
Regular elections
Incumbent retired 0 3 0 3
Held by same party 2 2
Replaced by other party   1 Republican replaced by   1 Democrat         1
Result 1 2 0 0 0 0 3
Incumbent ran 23 5 2 30
Won re-election 19 4 2 25
Lost re-election   1 Republican replaced by   1 Democrat
  4 Democrats replaced by   4 Republicans
        5
Result 20 8 2 0 0 0 30
Special elections
Appointee ran 1 1 2
Appointee elected 1 1 2
Result 1 1 0 0 0 0 2
Total elected 22 11 2 0 0 0 35
Net gain/loss   2   2         2
Nationwide vote 52,224,867 34,722,926 808,370 590,051 200,599 1,262,765 90,473,222
Share 58.17% 38.67% 0.90% 0.66% 0.22% 1.41% 100%
Result 45 53 2 0 0 0 100

Source: Clerk of the U.S. House of Representatives.[1]

Change in composition edit

Each block represents one of the one hundred seats in the Senate. "D#" is a Democratic senator, "I#" is an independent senator and "R#" is a Republican senator. Arranged so parties are separated and a majority is clear by crossing the middle.

Before the elections edit

Each block indicates an incumbent senator's actions going into the election. Some "Ran" for re-election, some "Retired," and those without a note were not up for election this cycle. Before the elections, Republicans held 51 seats, Democrats held 47, and Independents held 2.

After the 2017 Senate special election in Alabama on the start of the second session in the 115th Congress.

D1
Ala.
Gain
D2 D3 D4 D5 D6 D7 D8 D9 D10
D20 D19 D18 D17 D16 D15 D14 D13 D12 D11
D21 D22 D23 D24
Calif.
Ran
D25
Conn.
Ran
D26
Del.
Ran
D27
Fla.
Ran
D28
Hawaii
Ran
D29
Ind.
Ran
D30
Md.
Ran
D40
N.D.
Ran
D39
N.Y.
Ran
D38
N.M.
Ran
D37
N.J.
Ran
D36
Mont.
Ran
D35
Mo.
Ran
D34
Minn. (sp)
Ran
D33
Minn. (reg)
Ran
D32
Mich.
Ran
D31
Mass.
Ran
D41
Ohio
Ran
D42
Penn.
Ran
D43
R.I.
Ran
D44
Va.
Ran
D45
Wash.
Ran
D46
W.Va.
Ran
D47
Wis.
Ran
I1
Maine
Ran
I2
Vt.
Ran
R51
Wyo.
Ran
Majority →
R41 R42 R43
Ariz.
Retired
R44
Miss. (reg)
Ran
R45
Miss. (sp)
Ran
R46
Neb.
Ran
R47
Nev.
Ran
R48
Tenn.
Retired
R49
Texas
Ran
R50
Utah
Retired
R40 R39 R38 R37 R36 R35 R34 R33 R32 R31
R21 R22 R23 R24 R25 R26 R27 R28 R29 R30
R20 R19 R18 R17 R16 R15 R14 R13 R12 R11
R1 R2 R3 R4 R5 R6 R7 R8 R9 R10

After the elections edit

Some senators were "Re-elected," some were a "Gain" in the seat from the other party (either by beating an incumbent or by winning an open seat), some were a "Hold" by the same party but with a different senator, and those without a note were not up for election this year.

After these elections, Democrats had 45 seats, independents had 2, and Republicans had 53.

D1 D2 D3 D4 D5 D6 D7 D8 D9 D10
D20 D19 D18 D17 D16 D15 D14 D13 D12 D11
D21 D22 D23 D24
Calif.
Re-elected
D25
Conn.
Re-elected
D26
Del.
Re-elected
D27
Hawaii
Re-elected
D28
Md.
Re-elected
D29
Mass.
Re-elected
D30
Mich.
Re-elected
D40
Va.
Re-elected
D39
R.I.
Re-elected
D38
Pa.
Re-elected
D37
Ohio
Re-elected
D36
N.Y.
Re-elected
D35
N.M.
Re-elected
D34
N.J.
Re-elected
D33
Mont.
Re-elected
D32
Minn. (sp)
Elected[e]
D31
Minn. (reg)
Re-elected
D41
Wash.
Re-elected
D42
W.Va.
Re-elected
D43
Wis.
Re-elected
D44
Ariz.
Gain
D45
Nev.
Gain
I1
Maine
Re-elected
I2
Vt.
Re-elected
R53
N.D.
Gain
R52
Mo.
Gain
R51
Ind.
Gain
Majority →
R41 R42 R43
Miss. (reg)
Re-elected
R44
Miss. (sp)
Elected[e]
R45
Neb.
Re-elected
R46
Tenn.
Hold
R47
Tex.
Re-elected
R48
Utah
Hold
R49
Wyo.
Re-elected
R50
Fla.
Gain
R40 R39 R38 R37 R36 R35 R34 R33 R32 R31
R21 R22 R23 R24 R25 R26 R27 R28 R29 R30
R20 R19 R18 R17 R16 R15 R14 R13 R12 R11
R1 R2 R3 R4 R5 R6 R7 R8 R9 R10
Key:
D# Democratic
R# Republican
I# Independent, caucusing with Democrats

Final pre-election predictions edit

Several sites and individuals publish predictions of competitive seats. These predictions look at factors such as the strength of the incumbent (if the incumbent is running for re-election) and the other candidates, and the state's partisan lean (reflected in part by the state's Cook Partisan Voting Index rating). The predictions assign ratings to each seat, indicating the predicted advantage that a party has in winning that seat.

Most election predictors used:

  • "tossup": no advantage
  • "tilt" (used by some predictors): advantage that is not quite as strong as "lean"
  • "lean": slight advantage
  • "likely" or "favored": significant, but surmountable, advantage
  • "safe" or "solid": near-certain chance of victory
Constituency Incumbent 2018 election ratings
State PVI[15] Senator Last
election[f]
Cook
Oct 26,
2018
[16]
IE
Nov 1,
2018
[17]
Sabato
Nov 5,
2018
[18]
NYT
Nov 5,
2018
[19]
Fox News[g]
Nov 5,
2018
[20]
CNN
Nov 2,
2018
[21]
RCP
Nov 5,
2018
[22]
Daily Kos
Nov 5,
2018
[23]
Politico
Nov 5,
2018
[24]
538[h]
Nov 6,
2018
[25]
Result
Arizona R+5 Jeff Flake
(retiring)
49.2% R Tossup Tilt D (flip) Lean D (flip) Tossup Tossup Tossup Tossup Tossup Tossup Lean D (flip) Sinema
50.0% D (flip)
California D+12 Dianne Feinstein 62.5% D Safe D Safe D Safe D Safe D Likely D Safe D Safe D Safe D Safe D Safe D Feinstein
54.2% D
Connecticut D+6 Chris Murphy 54.8% D Safe D Safe D Safe D Safe D Likely D Safe D Safe D Safe D Safe D Safe D Murphy
59.5% D
Delaware D+6 Tom Carper 66.4% D Safe D Safe D Safe D Safe D Likely D Safe D Safe D Safe D Safe D Safe D Carper
60.0% D
Florida R+2 Bill Nelson 55.2% D Tossup Tilt D Lean D Tossup Tossup Tossup Tossup Tossup Tossup Lean D Scott
50.1% R (flip)
Hawaii D+18 Mazie Hirono 62.6% D Safe D Safe D Safe D Safe D Likely D Safe D Safe D Safe D Safe D Safe D Hirono
71.2% D
Indiana R+9 Joe Donnelly 50.0% D Tossup Tossup Lean R (flip) Tossup Tossup Tossup Tossup Tossup Tossup Lean D Braun
50.7% R (flip)
Maine D+3 Angus King 52.9% I Safe I Safe I Safe I Safe I Likely I Safe I Safe I Safe I Safe I Safe I King
54.3% I
Maryland D+12 Ben Cardin 56.0% D Safe D Safe D Safe D Safe D Likely D Safe D Safe D Safe D Safe D Safe D Cardin
64.9% D
Massachusetts D+12 Elizabeth Warren 53.7% D Safe D Safe D Safe D Safe D Likely D Safe D Safe D Safe D Safe D Safe D Warren
60.3% D
Michigan D+1 Debbie Stabenow 58.8% D Likely D Safe D Safe D Likely D Likely D Likely D Lean D Safe D Likely D Safe D Stabenow
52.3% D
Minnesota
(regular)
D+1 Amy Klobuchar 65.2% D Safe D Safe D Safe D Safe D Likely D Safe D Safe D Safe D Safe D Safe D Klobuchar
60.3% D
Minnesota
(special)
D+1 Tina Smith Appointed
(2018)[i]
Lean D Likely D Likely D Lean D Likely D Likely D Lean D Likely D Likely D Likely D Smith
53.0% D
Mississippi
(regular)
R+9 Roger Wicker 57.1% R Safe R Safe R Safe R Safe R Likely R Safe R Safe R Safe R Safe R Safe R Wicker
58.5% R
Mississippi
(special)[j]
R+9 Cindy Hyde-Smith Appointed
(2018)[k]
Lean R Safe R Likely R Lean R Lean R Safe R Likely R Likely R Likely R Lean R Hyde-Smith
53.6% R
Missouri R+9 Claire McCaskill 54.8% D Tossup Tilt R (flip) Lean R (flip) Tossup Tossup Tossup Tossup Tossup Tossup Tossup Hawley
51.4% R (flip)
Montana R+11 Jon Tester 48.6% D Tossup Tilt D Lean D Tossup Lean D Lean D Tossup Tossup Lean D Likely D Tester
50.3% D
Nebraska R+14 Deb Fischer 57.8% R Safe R Safe R Safe R Safe R Likely R Safe R Safe R Safe R Safe R Safe R Fischer
57.7% R
Nevada D+1 Dean Heller 45.9% R Tossup Tilt D (flip) Lean D (flip) Tossup Tossup Tossup Tossup Tossup Tossup Tossup Rosen
50.4% D (flip)
New Jersey D+7 Bob Menendez 58.9% D Tossup Likely D Likely D Tossup Lean D Lean D Lean D Lean D Lean D Likely D Menendez
54.0% D
New Mexico D+3 Martin Heinrich 51.0% D Safe D Safe D Safe D Safe D Likely D Safe D Safe D Safe D Safe D Safe D Heinrich
54.1% D
New York D+11 Kirsten Gillibrand 72.2% D Safe D Safe D Safe D Safe D Likely D Safe D Safe D Safe D Safe D Safe D Gillibrand
67.0% D
North Dakota R+16 Heidi Heitkamp 50.2% D Lean R (flip) Lean R (flip) Lean R (flip) Lean R (flip) Likely R (flip) Lean R (flip) Lean R (flip) Lean R (flip) Lean R (flip) Lean R (flip) Cramer
55.4% R (flip)
Ohio R+3 Sherrod Brown 50.7% D Likely D Safe D Likely D Likely D Likely D Likely D Lean D Likely D Likely D Safe D Brown
53.4% D
Pennsylvania EVEN Bob Casey Jr. 53.7% D Likely D Safe D Safe D Likely D Likely D Likely D Likely D Safe D Likely D Safe D Casey
55.7% D
Rhode Island D+10 Sheldon Whitehouse 64.8% D Safe D Safe D Safe D Safe D Likely D Safe D Safe D Safe D Safe D Safe D Whitehouse
61.5% D
Tennessee R+14 Bob Corker
(retiring)
64.9% R Tossup Lean R Lean R Tossup Lean R Tossup Tossup Lean R Lean R Likely R Blackburn
54.7% R
Texas R+8 Ted Cruz 56.5% R Tossup Likely R Lean R Tossup Lean R Lean R Lean R Lean R Lean R Likely R Cruz
50.9% R
Utah R+20 Orrin Hatch
(retiring)
65.3% R Safe R Safe R Safe R Safe R Likely R Safe R Safe R Safe R Safe R Safe R Romney
62.6% R
Vermont D+15 Bernie Sanders 71.0% I Safe I Safe I Safe I Safe I Likely I Safe I Safe I Safe I Safe I Safe I Sanders
67.4% I
Virginia D+1 Tim Kaine 52.3% D Safe D Safe D Safe D Safe D Likely D Safe D Safe D Safe D Safe D Safe D Kaine
57.0% D
Washington D+7 Maria Cantwell 60.4% D Safe D Safe D Safe D Safe D Likely D Safe D Safe D Safe D Safe D Safe D Cantwell
58.3% D
West Virginia R+20 Joe Manchin 60.6% D Lean D Tilt D Lean D Lean D Lean D Lean D Tossup Lean D Lean D Likely D Manchin
49.6% D
Wisconsin EVEN Tammy Baldwin 51.4% D Likely D Safe D Likely D Likely D Likely D Likely D Lean D Likely D Likely D Safe D Baldwin
55.4% D
Wyoming R+25 John Barrasso 75.7% R Safe R Safe R Safe R Safe R Likely R Safe R Safe R Safe R Safe R Safe R Barrasso
67.0% R
Overall[l] D - 43
R - 48
9 tossups
D - 48
R - 51
1 tossup
D - 48
R - 52
0 tossups
D - 43
R - 48
9 tossups
D - 45
R - 50
5 tossups
D - 45
R - 49
6 tossups
D - 43
R - 49
8 tossups
D - 44
R - 50
6 tossups
D - 45
R - 50
5 tossups
D - 48
R - 50
2 tossups
Results:
D - 47
R - 53

Election dates edit

These are the election dates for the regularly scheduled general elections.

State Filing
deadline[26]
Primary
election[27]
Primary
run-off
(if necessary)[27]
General
election
Poll closing
(Eastern Time)[28]
Arizona May 30, 2018 August 28, 2018 N/A November 6, 2018 9pm
California March 9, 2018 June 5, 2018 N/A November 6, 2018 11pm
Connecticut June 12, 2018 August 14, 2018 N/A November 6, 2018 8pm
Delaware July 10, 2018 September 6, 2018 N/A November 6, 2018 8pm
Florida May 4, 2018 August 28, 2018 N/A November 6, 2018 7pm and 8pm
Hawaii June 5, 2018 August 11, 2018 N/A November 6, 2018 11pm
Indiana February 9, 2018 May 8, 2018 N/A November 6, 2018 6pm and 7pm
Maine March 15, 2018 June 12, 2018 N/A November 6, 2018 8pm
Maryland February 27, 2018 June 26, 2018 N/A November 6, 2018 8pm
Massachusetts June 5, 2018 September 4, 2018 N/A November 6, 2018 8pm
Michigan April 24, 2018 August 7, 2018 N/A November 6, 2018 8pm and 9pm
Minnesota June 5, 2018 August 14, 2018 N/A November 6, 2018 9pm
Mississippi March 1, 2018 June 5, 2018 June 26, 2018 November 6, 2018 8pm
Mississippi (special) March 26, 2018 November 6, 2018 N/A November 27, 2018[m] 8pm
Missouri March 27, 2018 August 7, 2018 N/A November 6, 2018 8pm
Montana March 12, 2018 June 5, 2018 N/A November 6, 2018 10pm
Nebraska March 1, 2018 May 15, 2018 N/A November 6, 2018 9pm
Nevada March 16, 2018 June 12, 2018 N/A November 6, 2018 10pm
New Jersey April 2, 2018 June 5, 2018 N/A November 6, 2018 8pm
New Mexico March 13, 2018 June 5, 2018 N/A November 6, 2018 9pm
New York April 12, 2018 June 26, 2018 N/A November 6, 2018 9pm
North Dakota April 9, 2018 June 12, 2018 N/A November 6, 2018 8pm and 9pm
Ohio February 7, 2018 May 8, 2018 N/A November 6, 2018 7:30pm
Pennsylvania March 20, 2018 May 15, 2018 N/A November 6, 2018 8pm
Rhode Island June 27, 2018 September 12, 2018 N/A November 6, 2018 8pm
Tennessee April 5, 2018 August 2, 2018 N/A November 6, 2018 8pm
Texas December 11, 2017 March 6, 2018 May 22, 2018
(unnecessary)
November 6, 2018 8pm and 9pm
Utah March 15, 2018 June 26, 2018 N/A November 6, 2018 10pm
Vermont May 31, 2018 August 14, 2018 N/A November 6, 2018 7pm
Virginia March 29, 2018 June 12, 2018 N/A November 6, 2018 7pm
Washington May 18, 2018 August 7, 2018 N/A November 6, 2018 11pm
West Virginia January 27, 2018 May 8, 2018 N/A November 6, 2018 7:30pm
Wisconsin June 1, 2018 August 14, 2018 N/A November 6, 2018 9pm
Wyoming June 1, 2018 August 21, 2018 N/A November 6, 2018 9pm

Gains and losses edit

Retirements edit

Three Republicans retired instead of seeking re-election.

Defeats edit

Four Democrats and one Republican sought re-election but lost in the general election.

Post-election changes edit

One Republican resigned before the start of the 116th Congress on December 31, 2018, one other Republican also resigned during the 116th Congress due to health reasons. Initially, all were replaced by Republican appointees.

State Senator Replaced by
Arizona
(Class 3)
Jon Kyl Martha McSally
Georgia
(Class 3)
Johnny Isakson Kelly Loeffler

Race summary edit

Special elections during the preceding Congress edit

In these special elections, the winners will be seated before January 3, 2019, when elected and qualified. They are ordered by election date, then by state and by class.

State
(linked to
summaries below)
Incumbent Results Candidates
Senator Party Electoral
history
Minnesota
(Class 2)
Tina Smith DFL 2018 (Appointed) Interim appointee elected.
Mississippi
(Class 2)
Cindy Hyde-Smith Republican 2018 (Appointed) Interim appointee elected.

Elections leading to the next Congress edit

In these general elections, the winners were elected for the term beginning January 3, 2019.

All of the elections involve the Class 1 seats and they are ordered by state.

State
(linked to
summaries below)
Incumbent Results Candidates
Senator Party Electoral
history
Arizona Jeff Flake Republican 2012 Incumbent retired.
New senator elected.
Democratic gain.
California Dianne Feinstein Democratic 1992 (special)
1994
2000
2006
2012
Incumbent re-elected.
Connecticut Chris Murphy Democratic 2012 Incumbent re-elected.
  •  Y Chris Murphy (Democratic) 59.5%
  • Matthew Corey (Republican) 39.4%
  • Richard Lion (Libertarian) 0.6%
  • Jeff Russell (Green) 0.5%
Delaware Tom Carper Democratic 2000
2006
2012
Incumbent re-elected.
  •  Y Tom Carper (Democratic) 60.0%
  • Robert Arlett (Republican) 37.8%
  • Demitri Theodoropoulos (Green) 1.2%
  • Nadine Frost (Libertarian) 1.1%
Florida Bill Nelson Democratic 2000
2006
2012
Incumbent lost re-election.
New senator elected.
Republican gain.
Winner delayed term until January 8, 2019, to finish his term as Governor of Florida.
Hawaii Mazie Hirono Democratic 2012 Incumbent re-elected.
  •  Y Mazie Hirono (Democratic) 71.2%
  • Ron Curtis (Republican) 28.8%
Indiana Joe Donnelly Democratic 2012 Incumbent lost re-election.
New senator elected.
Republican gain.
Maine Angus King Independent 2012 Incumbent re-elected.
  •  Y Angus King (Independent) 54.3%
  • Eric Brakey (Republican) 35.2%
  • Zak Ringelstein (Democratic) 10.4%
Maryland Ben Cardin Democratic 2006
2012
Incumbent re-elected.
  •  Y Ben Cardin (Democratic) 64.9%
  • Tony Campbell (Republican) 30.3%
  • Neal Simon (Independent) 3.7%
  • Arvin Vohra (Libertarian) 1%
  • Michael Puskar (Independent) (write-in)
Massachusetts Elizabeth Warren Democratic 2012 Incumbent re-elected.
Michigan Debbie Stabenow Democratic 2000
2006
2012
Incumbent re-elected.
  •  Y Debbie Stabenow (Democratic) 52.3%
  • John James (Republican) 45.8%
  • Marcia Squier (Independent) 1%
  • George Huffman III (Constitution) 0.6%
  • John Wilhelm (Natural Law) 0.4%
Minnesota Amy Klobuchar DFL 2006
2012
Incumbent re-elected.
  •  Y Amy Klobuchar (DFL) 60.3%
  • Jim Newberger (Republican) 36.2%
  • Dennis Schuller (Legal Marijuana Now) 2.5%
  • Paula M. Overby (Green) 0.9%
Mississippi Roger Wicker Republican 2007 (Appointed)
2008 (special)
2012
Incumbent re-elected.
  •  Y Roger Wicker (Republican) 58.5%
  • David Baria (Democratic) 39.5%
  • Danny Bedwell (Libertarian) 1.4%
  • Shawn O'Hara (Reform) 0.6%
Missouri Claire McCaskill Democratic 2006
2012
Incumbent lost re-election.
New senator elected.
Republican gain.
  •  Y Josh Hawley (Republican) 51.4%
  • Claire McCaskill (Democratic) 45.6%
  • Craig O'Dear (Independent) 1.4%
  • Japheth Campbell (Libertarian) 1.1%
  • Jo Crain (Green) 0.5%
Montana Jon Tester Democratic 2006
2012
Incumbent re-elected.
Nebraska Deb Fischer Republican 2012 Incumbent re-elected.
Nevada Dean Heller Republican 2011 (Appointed)
2012
Incumbent lost re-election.
New senator elected.
Democratic gain.
  •  Y Jacky Rosen (Democratic) 50.4%
  • Dean Heller (Republican) 45.4%
  • Barry Michaels (Independent) 1%
  • Tim Hagan (Libertarian) 0.9%
  • Kamau Bakari (Independent American) 0.7%
New Jersey Bob Menendez Democratic 2006 (Appointed)
2006
2012
Incumbent re-elected.
Others
  • Natalie Rivera (For The People) 0.6%
  • Tricia Flanagan (New Day NJ) 0.5%
  • Kevin Kimple (Make It Simple) 0.3%
  • Hank Schroeder (Economic Growth) 0.3%
New Mexico Martin Heinrich Democratic 2012 Incumbent re-elected.
New York Kirsten Gillibrand Democratic 2009 (Appointed)
2010 (special)
2012
Incumbent re-elected.
North Dakota Heidi Heitkamp Democratic-NPL 2012 Incumbent lost re-election.
New senator elected.
Republican gain.
Ohio Sherrod Brown Democratic 2006
2012
Incumbent re-elected.
Pennsylvania Bob Casey Jr. Democratic 2006
2012
Incumbent re-elected.
  •  Y Bob Casey Jr. (Democratic) 55.7%
  • Lou Barletta (Republican) 42.6%
  • Dale Kerns (Libertarian) 1%
  • Neal Gale (Green) 0.6%
Rhode Island Sheldon Whitehouse Democratic 2006
2012
Incumbent re-elected.
Tennessee Bob Corker Republican 2006
2012
Incumbent retired.
New senator elected.
Republican hold.
Others
  • Trudy Austin (Independent) 0.4%
  • Dean Hill (Independent) 0.4%
  • Kris Todd (Independent) 0.2%
  • John Carico (Independent) 0.2%
  • Breton Phillips (Independent) 0.1%
  • Kevin McCants (Independent) 0.1%
Texas Ted Cruz Republican 2012 Incumbent re-elected.
  •  Y Ted Cruz (Republican) 50.9%
  • Beto O'Rourke (Democratic) 48.3%
  • Neal Dikeman (Libertarian) 0.8%
Utah Orrin Hatch Republican 1976
1982
1988
1994
2000
2006
2012
Incumbent retired.
New senator elected.
Republican hold.
  •  Y Mitt Romney (Republican) 62.6%
  • Jenny Wilson (Democratic) 30.9%
  • Tim Aalders (Constitution) 2.7%
  • Craig Bowden (Libertarian) 2.6%
  • Reed McCandless (Independent American) 1.2%
Vermont Bernie Sanders Independent 2006
2012
Incumbent re-elected.
  •  Y Bernie Sanders (Independent) 67.4%
  • Lawrence Zupan (Republican) 27.5%
Virginia Tim Kaine Democratic 2012 Incumbent re-elected.
Washington Maria Cantwell Democratic 2000
2006
2012
Incumbent re-elected.
West Virginia Joe Manchin Democratic 2010 (special)
2012
Incumbent re-elected.
Wisconsin Tammy Baldwin Democratic 2012 Incumbent re-elected.
Wyoming John Barrasso Republican 2007 (Appointed)
2008 (special)
2012
Incumbent re-elected.

Closest races edit

In twelve races the margin of victory was under 10% (although in California, the Senate race was fought between two members of the Democratic Party, Dianne Feinstein and Kevin de Leon, because of California's run-off system).

State Party of winner Margin
Florida Republican (flip) 0.12%
Arizona Democratic (flip) 2.34%
Texas Republican 2.57%
West Virginia Democratic 3.31%
Montana Democratic 3.55%
Nevada Democratic (flip) 5.03%
Missouri Republican (flip) 5.81%
Indiana Republican (flip) 5.89%[n]
Michigan Democratic 6.51%
Ohio Democratic 6.85%
Mississippi (special) Republican 7.27%
California Democratic 8.33%[o]

Arizona edit

Arizona election
 
← 2012
2024 →
Turnout64.85%
     
Nominee Kyrsten Sinema Martha McSally
Party Democratic Republican
Popular vote 1,191,100 1,135,200
Percentage 49.96% 47.61%

 
Sinema:      50–60%      60–70%
McSally:      50–60%      60–70%      70–80%

U.S. senator before election

Jeff Flake
Republican

Elected U.S. senator

Kyrsten Sinema
Democratic

One-term Republican Jeff Flake was elected with 49% of the vote in 2012. He chose not to run for re-election.[30]

U.S. Representative Martha McSally[31] won the Republican nomination in a three-way primary on August 28, 2018, against Joe Arpaio and Kelli Ward.

U.S. Representative Kyrsten Sinema[31] easily secured the Democratic nomination.

Sinema defeated McSally by a slim margin; her victory became official only after six days of counting ballots.

Arizona Republican primary
Party Candidate Votes %
Republican Martha McSally 357,626 54.57
Republican Kelli Ward 180,926 27.61
Republican Joe Arpaio 116,555 17.79
Write-in 191 0.03
Total votes 655,298 100.00
Arizona Democratic primary
Party Candidate Votes %
Democratic Kyrsten Sinema 404,170 79.25
Democratic Deedra Abboud 105,800 20.75
Total votes 509,970 100.00
Arizona general election[32]
Party Candidate Votes % ±%
Democratic Kyrsten Sinema 1,191,100 49.96% +3.76
Republican Martha McSally 1,135,200 47.61% –1.62
Green Angela Green 57,442 2.41% N/A
Write-in 566 0.02% +0.01
Total votes 2,384,308 100.00%
Democratic gain from Republican

California edit

California election
 
← 2012
2024 →
Turnout56.42%
     
Nominee Dianne Feinstein Kevin de León
Party Democratic Democratic
Popular vote 6,019,422 5,093,942
Percentage 54.16% 45.84%

 
County results
Feinstein:      50–60%      60–70%
de León:      50–60%      60–70%      70–80%

U.S. senator before election

Dianne Feinstein
Democratic

Elected U.S. senator

Dianne Feinstein
Democratic

Four-term Democrat Dianne Feinstein won a special election in 1992 and was elected to full terms in 1994, 2000, 2006, and 2012. She ran for re-election and advanced to the general election after securing the top spot in the June 5 jungle primary.[33]

The June 5 primary ballot listed 32 candidates (Feinstein plus 31 challengers) in addition to 3 write-in candidates. There were 10 Democratic candidates, 11 Republican candidates, one Libertarian, one Peace and Freedom candidate, and 9 independent candidates. There was also a Green Party candidate who ran as a write-in.

President pro tempore of the California State Senate Kevin de León advanced to the general election for the right to challenge Feinstein after securing the second spot in the primary.[33]

The 11 Republican candidates who ran in the primary combined for 33.2% of the vote. The top Republican candidate, James P. Bradley, received 8.3% of the vote, which put him in 3rd place at 3.8% behind the second-place finisher, Kevin DeLeon.[34]

On November 6, Dianne Feinstein was elected to a fifth term, defeating Kevin de León.

California blanket primary
Party Candidate Votes %
Democratic Dianne Feinstein (incumbent) 2,947,035 44.18
Democratic Kevin de León 805,446 12.07
Republican James P. Bradley 556,252 8.34
Republican Arun K. Bhumitra 350,815 5.26
Republican Paul A. Taylor 323,534 4.85
Republican Erin Cruz 267,494 4.01
Republican Tom Palzer 205,183 3.08
Democratic Alison Hartson 147,061 2.20
Republican Rocky De La Fuente 135,279 2.03
Democratic Pat Harris 126,947 1.90
Republican John "Jack" Crew 93,808 1.41
Republican Patrick Little 89,867 1.35
Republican Kevin Mottus 87,646 1.31
Republican Jerry Joseph Laws 67,140 1.01
Libertarian Derrick Michael Reid 60,000 0.90
Democratic Adrienne Nicole Edwards 56,172 0.84
Democratic Douglas Howard Pierce 42,671 0.64
Republican Mario Nabliba 39,209 0.59
Democratic David Hildebrand 30,305 0.45
Democratic Donnie O. Turner 30,101 0.45
Democratic Herbert G. Peters 27,468 0.41
No party preference David Moore 24,614 0.37
No party preference Ling Ling Shi 23,506 0.35
Peace and Freedom John Parker 22,825 0.34
No party preference Lee Olson 20,393 0.31
Democratic Gerald Plummer 18,234 0.27
No party preference Jason M. Hanania 18,171 0.27
No party preference Don J. Grundmann 15,125 0.23
No party preference Colleen Shea Fernald 13,536 0.20
No party preference Rash Bihari Ghosh 12,557 0.19
No party preference Tim Gildersleeve 8,482 0.13
No party preference Michael Fahmy Girgis 2,986 0.04
Write-in 863 0.01
Total votes 6,670,720 100.00
California general election[32]
Party Candidate Votes % ±%
Democratic Dianne Feinstein (incumbent) 6,019,422 54.16% –8.36
Democratic Kevin de León 5,093,942 45.84% N/A
Total votes 11,113,364 100.00%
Democratic hold

Connecticut edit

Connecticut election
 
← 2012
2024 →
Turnout63.58%
     
Nominee Chris Murphy Matthew Corey
Party Democratic Republican
Popular vote 825,579 545,717
Percentage 59.53% 39.35%

 
 
Murphy:      40–50%      50–60%      60–70%      70–80%      80–90%      >90%
Corey:      40–50%      50–60%      60–70%

U.S. senator before election

Chris Murphy
Democratic

Elected U.S. senator

Chris Murphy
Democratic

One-term Democrat Chris Murphy was elected with 55% of the vote in 2012. He ran for re-election.[35]

Businessmen Matthew Corey[36] received the Republican nomination.

Chris Murphy was elected to a second term, winning nearly 60% of the vote.[37]

Connecticut Republican primary
Party Candidate Votes %
Republican Matthew Corey 99,899 76.54
Republican Dominic Rapini 30,624 23.46
Total votes 130,523 100.00
Connecticut general election[32]
Party Candidate Votes % ±%
Democratic Chris Murphy (incumbent) 825,579 59.53% +4.71
Republican Matthew Corey 545,717 39.35% –3.72
Libertarian Richard Lion 8,838 0.64% –1.02
Green Jeff Russell 6,618 0.48% N/A
Write-in 88 0.01% –0.44
Total votes 1,386,840 100.00%
Democratic hold

Delaware edit

Delaware election
 
← 2012
2024 →
Turnout52.18%
     
Nominee Tom Carper Rob Arlett
Party Democratic Republican
Popular vote 217,385 137,127
Percentage 59.95% 37.81%

 
Carper:      50–60%      60–70%
Arlett:      50–60%

U.S. senator before election

Tom Carper
Democratic

Elected U.S. senator

Tom Carper
Democratic

Three-term Democrat Tom Carper won re-election with 66% of the vote in 2012. He announced he was running for re-election during an interview on MSNBC on July 24, 2017.[38] He defeated Dover community activist Kerri Evelyn Harris for the Democratic nomination. Sussex County Councilman Robert Arlett won the Republican nomination.[38]

Tom Carper defeated Arlett, winning 60% of the vote.[39]

Delaware Democratic primary
Party Candidate Votes %
Democratic Tom Carper (incumbent) 53,635 64.59
Democratic Kerri Evelyn Harris 29,407 35.41
Total votes 83,042 100.00
Delaware Republican primary
Party Candidate Votes %
Republican Rob Arlett 25,284 66.77
Republican Gene Truono 10,587 27.96
Republican Rocky De La Fuente 1,998 5.28
Total votes 37,870 100.00
Delaware general election[32]
Party Candidate Votes % ±%
Democratic Tom Carper (incumbent) 217,385 59.95% –6.47
Republican Rob Arlett 137,127 37.82% +8.87
Green Demitri Theodoropoulos 4,170 1.15% +0.35
Libertarian Nadine Frost 3,910 1.08% N/A
Write-in 14 0.00% N/A
Total votes 362,606 100.00%
Democratic hold

Florida edit

Florida election
 
← 2012
2024 →
Turnout61.68%
     
Nominee Rick Scott Bill Nelson
Party Republican Democratic
Popular vote 4,099,505 4,089,472
Percentage 50.05% 49.93%

 
Scott:      50–60%      60–70%      70–80%      80–90%
Nelson:      50–60%      60–70%

U.S. senator before election

Bill Nelson
Democratic

Elected U.S. senator

Rick Scott
Republican

Three-term Democrat Bill Nelson was re-elected with 55% of the vote in 2012. He sought re-election to a fourth term in office.[40]

Florida Governor Rick Scott won the Republican nomination. First elected in 2010 and re-elected in 2014, Scott's term as Governor of Florida was set to end by January 2019, due to term limits.[40]

Edward Janowski was running as an independent, but did not qualify.[40]

Scott led among ballots tallied on election night, but given the close margins of the race recounts were ordered.[41] Final recount numbers were released following a machine and hand recount with Rick Scott maintaining a lead.[42] On November 18, Nelson conceded to Scott.[43] Two days later, election results were certified by the state, cementing Scott's win.[44]

Florida Republican primary
Party Candidate Votes %
Republican Rick Scott 1,456,187 88.61
Republican Rocky De La Fuente 187,209 11.39
Total votes 1,643,396 100.00
Florida general election[32]
Party Candidate Votes % ±%
Republican Rick Scott 4,099,505 50.05% +7.82
Democratic Bill Nelson (incumbent) 4,089,472 49.93% –5.30
Write-in 1,028 0.01% +0.01
Total votes 8,190,005 100.00%
Republican gain from Democratic

Hawaii edit

Hawaii election
 
← 2012
2024 →
Turnout51.32%
     
Nominee Mazie Hirono Ron Curtis
Party Democratic Republican
Popular vote 276,316 112,035
Percentage 71.15% 28.85%

 
County results
Hirono:      60–70%      70–80%

U.S. senator before election

Mazie Hirono
Democratic

Elected U.S. senator

Mazie Hirono
Democratic

One-term Democrat Mazie Hirono was elected with 63% of the vote in 2012. She ran.[45]

Ron Curtis was the Republican nominee.

Hirono was elected to a second term by a landslide.

Hawaii Democratic primary
Party Candidate Votes %
Democratic Mazie Hirono (incumbent) 201,679 100.00
Total votes 201,679 100.00
Hawaii Republican primary
Party Candidate Votes %
Republican Ron Curtis 6,370 23.73
Republican Consuelo Anderson 5,172 19.26
Republican Robert C. Helsham Sr. 3,988 14.85
Republican Thomas E. White 3,661 13.64
Republican Rocky De La Fuente 3,065 11.42
Republican George L. Berish 1,658 6.18
Republican Michael R. Hodgkiss 1,576 5.87
Republican Eddie Pirkowski 1,358 5.06
Total votes 26,848 100.00
Hawaii general election[32]
Party Candidate Votes % ±%
Democratic Mazie Hirono (incumbent) 276,316 71.15% +8.55
Republican Ron Curtis 112,035 28.85% –8.55
Total votes 388,351 100.00%
Democratic hold

Indiana edit

Indiana election
 
← 2012
2024 →
Turnout50.42%
     
Nominee Mike Braun Joe Donnelly
Party Republican Democratic
Popular vote 1,158,000 1,023,553
Percentage 50.73% 44.84%

 
County results
Braun:      40–50%      50–60%      60–70%      70–80%
Donnelly:      40–50%      50–60%      60–70%

U.S. senator before election

Joe Donnelly
Democratic

Elected U.S. senator

Mike Braun
Republican

One-term Democrat Joe Donnelly was elected with 50.04% of the vote in 2012. He ran. He won the Democratic primary unopposed.[46]

State Representative Mike Braun[46] won the May 8 Republican primary. U.S. Representatives Luke Messer[47] and Todd Rokita[47] also ran for the Republican nomination.

James Johnson ran as an independent.[46]

Braun won election with 51% of the vote, defeating Joe Donnelly.[48]

Indiana Democratic primary
Party Candidate Votes %
Democratic Joe Donnelly (incumbent) 284,621 100.00
Total votes 284,621 100.00
Indiana Republican primary
Party Candidate Votes %
Republican Mike Braun 208,602 41.17
Republican Todd Rokita 151,967 29.99
Republican Luke Messer 146,131 28.84
Total votes 506,700 100.00
Indiana general election[32]
Party Candidate Votes % ±%
Republican Mike Braun 1,158,000 50.73% +6.45
Democratic Joe Donnelly (incumbent) 1,023,553 44.84% –5.20
Libertarian Lucy Brenton 100,942 4.42% –1.26
Write-in 70 0.00% N/A
Total votes 2,282,565 100.00%
Republican gain from Democratic

Maine edit

Maine election
 
← 2012
2024 →
Turnout59.96%
       
Nominee Angus King Eric Brakey Zak Ringelstein
Party Independent Republican Democratic
Popular vote 344,575 223,502 66,268
Percentage 54.31% 35.23% 10.45%

 
 
King:      40–50%      50–60%      60–70%      70–80%      80–90%      >90%
Brakey:      40–50%     50–60%      60–70%      70–80%      80–90%      >90%
Tie:      

U.S. senator before election

Angus King
Independent

Elected U.S. senator

Angus King
Independent

One-term Independent Senator Angus King was elected in a three-way race with 53% of the vote in 2012. King has caucused with the Democratic Party since taking office in 2013, but he has left open the possibility of caucusing with the Republican Party in the future.[49]

State Senator Eric Brakey ran unopposed for the Republican nomination.[50]

Public school teacher and founder of UClass Zak Ringelstein ran unopposed for the Democratic nomination.[50]

The election was conducted with ranked choice voting, as opposed to "First-past-the-post voting", after Maine voters passed a citizen referendum approving the change in 2016[51] and a June 2018 referendum sustaining the change.[52]

King was easily re-elected with over 50% of the vote.

Maine Democratic primary
Party Candidate Votes %
Democratic Zak Ringelstein 89,841 100.00
Total votes 89,841 100.00
Maine Republican primary
Party Candidate Votes %
Republican Eric Brakey 59,853 100.00
Total votes 59,853 100.00
Maine general election[32]
Party Candidate Votes % ±%
Independent Angus King (incumbent) 344,575 54.31% +1.42
Republican Eric Brakey 223,502 35.23% +4.48
Democratic Zak Ringelstein 66,268 10.45% –2.81
Write-in 64 0.01% N/A
Total votes 634,409 100.00%
Independent hold

Maryland edit

Maryland election
 
← 2012
2024 →
Turnout58.17%
     
Nominee Ben Cardin Tony Campbell
Party Democratic Republican
Popular vote 1,491,614 697,107
Percentage 64.86% 30.31%

 
Cardin:      40–50%      50–60%      60–70%      70–80%      80–90%      >90%
Campbell:      50–60%      70–80%

U.S. senator before election

Ben Cardin
Democratic

Elected U.S. senator

Ben Cardin
Democratic

Two-term Democrat Ben Cardin was re-elected with 56% of the vote in 2012. He won the Democratic primary.[53]

Tony Campbell, Evan Cronhardt, Nnabu Eze, Gerald Smith, and Blaine Taylor[54] were seeking the Republican nomination, with Campbell winning.

Arvin Vohra, vice chairman of the Libertarian National Committee, sought the Libertarian Party nomination.[54]

Independents Neal Simon[54] and Edward Shlikas[citation needed], and Michael B Puskar ran.

Cardin won re-election to a third term in office.[55]

Maryland Democratic primary
Party Candidate Votes %
Democratic Ben Cardin (incumbent) 477,441 80.28
Democratic Chelsea Manning 34,611 5.82
Democratic Jerome Segal 20,027 3.37
Democratic Debbie Wilson 18,953 3.19
Democratic Marcia H. Morgan 16,047 2.70
Democratic Lih Young 9,874 1.66
Democratic Richard Vaughn 9,480 1.59
Democratic Erik Jetmir 8,259 1.39
Total votes 594,692 100.00
Maryland Republican primary
Party Candidate Votes %
Republican Tony Campbell 51,426 29.22
Republican Chris Chaffee 42,328 24.05
Republican Christina J. Grigorian 30,756 17.48
Republican John Graziani 15,435 8.77
Republican Blaine Taylor 8,848 5.03
Republican Gerald I. Smith Jr. 7,564 4.30
Republican Brian Charles Vaeth 5,411 3.07
Republican Evan M. Cronhardt 4,445 2.53
Republican Bill Krehnbrink 3,606 2.05
Republican Nnabu Eze 3,442 1.96
Republican Albert Binyahmin Howard 2,720 1.55
Total votes 175,981 100.00
Maryland general election[32]
Party Candidate Votes % ±%
Democratic Ben Cardin (incumbent) 1,491,614 64.86% +8.88
Republican Tony Campbell 697,017 30.31% +3.98
Independent Neal Simon 85,964 3.74% N/A
Libertarian Arvin Vohra 22,943 1.00% –0.22
Write-in 2,351 0.10% ±0.00
Total votes 2,299,889 100.00%
Democratic hold

Massachusetts edit

Massachusetts election
 
← 2012
2024 →
Turnout59.17%
     
Nominee Elizabeth Warren Geoff Diehl
Party Democratic Republican
Popular vote 1,633,371 979,210
Percentage 60.34% 36.17%

 
 
Warren:      40–50%      50–60%      60–70%      70–80%      80–90%      >90%
Diehl:      40–50%      50–60%      60–70%

U.S. senator before election

Elizabeth Warren
Democratic

Elected U.S. senator

Elizabeth Warren
Democratic

One-term Democrat Elizabeth Warren was elected with 54% of the vote in 2012. She ran for re-election.[56]

State Representative Geoff Diehl,[57] attorney and founder of Better for America, John Kingston[57] and former Romney aide Beth Lindstrom,[57] ran for the Republican nomination. Diehl won the Republican nomination.

Shiva Ayyadurai[58] ran as an independent. Shiva started as in early 2017 as the first Republican in the race, but went independent in November 2017.

Warren defeated Diehl, winning a second term.[59]

Massachusetts Democratic primary
Party Candidate Votes %
Democratic Elizabeth Warren (incumbent) 590,835 98.08
Write-in 11,558 1.92
Total votes 602,393 100.00
Massachusetts Republican primary
Party Candidate Votes %
Republican Geoff Diehl 144,043 55.15
Republican John Kingston III 69,636 26.66
Republican Beth Joyce Lindstrom 46,693 17.88
Write-in 798 0.31
Total votes 261,170 100.00
Massachusetts general election[32]
Party Candidate Votes % ±%
Democratic Elizabeth Warren (incumbent) 1,633,371 60.34% +6.60
Republican Geoff Diehl 979,210 36.17% –10.02
Independent Shiva Ayyadurai 91,710 3.39% N/A
Write-in 2,799 0.10% +0.03
Total votes 2,707,090 100.00%
Democratic hold

Michigan edit

Michigan election
 
← 2012
2024 →
Turnout56.72%
     
Nominee Debbie Stabenow John James
Party Democratic Republican
Popular vote 2,214,478 1,938,818
Percentage 52.26% 45.76%

 
Stabenow:      40-50%      50–60%      60–70%      70–80%
James:      40–50%      50–60%      60–70%      70–80%

U.S. senator before election

Debbie Stabenow
Democratic

Elected U.S. senator

Debbie Stabenow
Democratic

Three-term Democrat Debbie Stabenow was re-elected with 59% of the vote in 2012.[60] She was renominated without Democratic opposition. On the Republican side, businessman John James won the nomination.[60]

In the final months of the election, polls showed the race was beginning to narrow. Ultimately, Stabenow was re-elected, defeating James, with a majority of the vote.

Michigan Democratic primary
Party Candidate Votes %
Democratic Debbie Stabenow (incumbent) 1,045,450 100.00
Total votes 1,045,450 100.00
Michigan Republican primary
Party Candidate Votes %
Republican John James 518,564 54.67
Republican Sandy Pensler 429,885 45.32
Write-in 57 0.01
Total votes 948,506 100.00
Michigan general election[32]
Party Candidate Votes % ±%
Democratic Debbie Stabenow (incumbent) 2,214,478 52.26% –6.54
Republican John James 1,938,818 45.76% +7.78
Green Marcia Squier 40,204 0.95% +0.35
Constitution George Huffman III 27,251 0.64% +0.08
Natural Law John Howard Wilhelm 16,502 0.39% +0.15
Write-in 18 0.00% ±0.00
Total votes 4,237,271 100.00%
Democratic hold

Minnesota edit

Minnesota (regular) edit

Minnesota general election
 
← 2012
2024 →
Turnout63.89%
     
Nominee Amy Klobuchar Jim Newberger
Party Democratic (DFL) Republican
Popular vote 1,566,174 940,437
Percentage 60.31% 36.21%

 
Klobuchar:      40–50%      50–60%      60–70%      70–80%
Newberger:      40–50%      50–60%      60–70%

Two-term Democrat Amy Klobuchar was re-elected with 65% of the vote in 2012. She ran for re-election.[61]

State Representative Jim Newberger[61] ran for the Republican nomination.

Klobuchar was easily re-elected.[62]

Minnesota Democratic (DFL) primary
Party Candidate Votes %
Democratic (DFL) Amy Klobuchar (incumbent) 557,306 95.70
Democratic (DFL) Steve Carlson 9,934 1.71
Democratic (DFL) Stephen A. Emery 7,047 1.21
Democratic (DFL) David Robert Groves 4,511 0.77
Democratic (DFL) Leonard J. Richards 3,552 0.61
Total votes 582,350 100.00
Minnesota Republican primary
Party Candidate Votes %
Republican Jim Newberger 201,531 69.50
Republican Merrill Anderson 45,492 15.69
Republican Rae Hart Anderon 25,883 8.93
Republican Rocky De La Fuente 17,051 5.88
Total votes 289,957 100.00
Minnesota general election[32]
Party Candidate Votes % ±%
Democratic (DFL) Amy Klobuchar (incumbent) 1,566,174 60.31% –4.92
Republican Jim Newberger 940,437 36.21% +5.68
Legal Marijuana Now Dennis Schuller 66,236 2.55% N/A
Green Paula M. Overby 23,101 0.89% N/A
Write-in 931 0.04% –0.05
Total votes 2,596,879 100.00%
Democratic (DFL) hold

Minnesota (special) edit

Minnesota special election
 
← 2014
2020 →
Turnout63.66%
     
Nominee Tina Smith Karin Housley
Party Democratic (DFL) Republican
Popular vote 1,370,540 1,095,777
Percentage 52.97% 42.35%

 
Smith:      40–50%      50–60%      60–70%
Housley:      40–50%      50–60%      60–70%

U.S. senator before election

Tina Smith
Democratic (DFL)

Elected U.S. senator

Tina Smith
Democratic (DFL)

Two-term Democrat Al Franken announced that he would resign in December 2017, following allegations of sexual harassment. Mark Dayton, Governor of Minnesota, appointed Lt. Gov. Tina Smith on January 2, 2018, as an interim Senator until the November 2018 election. She defeated primary challenger Richard Painter in the Democratic primary held on August 14.

Incumbent Tina Smith defeated Republican Karin Housley in the general election to finish the term ending January 3, 2021.

Minnesota Democratic (DFL) primary
Party Candidate Votes %
Democratic (DFL) Tina Smith (incumbent) 433,705 76.06
Democratic (DFL) Richard Painter 78,193 13.71
Democratic (DFL) Ali Chehem Ali 18,897 3.31
Democratic (DFL) Gregg A. Iverson 17,825 3.13
Democratic (DFL) Nick Leonard 16,529 2.90
Democratic (DFL) Christopher Lovell Seymore Sr. 5,041 0.88
Total votes 570,190 100.00
Minnesota Republican primary
Party Candidate Votes %
Republican Karin Housley 186,384 61.95
Republican Bob Anderson 107,102 35.60
Republican Nikolay Nikolayevich Bey 7,375 2.45
Total votes 300,861 100.00
Minnesota special election[32]
Party Candidate Votes % ±%
Democratic (DFL) Tina Smith (incumbent) 1,370,540 52.97% –0.18
Republican Karin Housley 1,095,777 42.35% –0.56
Legal Marijuana Now Sarah Wellington 95,614 3.70% N/A
Independent Jerry Trooien 24,324 0.94% N/A
Write-in 1,101 0.04% ±0.00
Total votes 2,587,356 100.00%
Democratic (DFL) hold

Mississippi edit

Mississippi (regular) edit

Mississippi general election
 
← 2012
2024 →
Turnout49.66%
     
Nominee Roger Wicker David Baria
Party Republican Democratic
Popular vote 547,619 369,567
Percentage 58.49% 39.47%

 
Wicker:      40-50%      50–60%      60–70%      70–80%      80–90%
Baria:      40-50%      50–60%      60–70%      70–80%

U.S. senator before election

Roger Wicker
Republican

Elected U.S. senator

Roger Wicker
Republican

One-term Republican Roger Wicker won re-election with 57% of the vote in 2012. He was appointed in 2007 and won a special election in 2008 to serve the remainder of Trent Lott's term.[29]

David Baria[29] won the Democratic nomination in a run-off on June 26.

Wicker was easily re-elected.[63]

Mississippi Republican primary
Party Candidate Votes %
Republican Roger Wicker (incumbent) 130,118 82.79
Republican Richard Boyanton 27,052 17.21
Total votes 157,170 100.00
Mississippi Democratic primary
Party Candidate Votes %
Democratic Howard Sherman 27,957 31.79
Democratic David Baria 27,244 30.98
Democratic Omeria Scott 21,278 24.20
Democratic Victor G. Maurice Jr. 4,361 4.96
Democratic Jerome Garland 4,266 4.85
Democratic Jensen Bohren 2,825 3.21
Total votes 87,931 100.00
Mississippi Democratic primary runoff
Party Candidate Votes %
Democratic David Baria 44,156 58.64
Democratic Howard Sherman 31,149 41.36
Total votes 75,305 100.00
Mississippi general election[32]
Party Candidate Votes % ±%
Republican Roger Wicker (incumbent) 547,619 58.49% +1.33
Democratic David Baria 369,567 39.47% –1.08
Libertarian Danny Bedwell 12,981 1.39% N/A
Reform Shawn O'Hara 6,048 0.65% –0.58
Total votes 936,215 100.00%
Republican hold

Mississippi (special) edit

2018 United States Senate special election in Mississippi
 
← 2014 November 6, 2018 (first round)
November 27, 2018 (runoff)
2020 →
Turnout48.14%
       
Candidate Cindy Hyde-Smith Mike Espy Chris McDaniel
Party Republican Democratic Republican
First round 389,995
41.2%
386,742
40.9%
154,878
16.4%
Runoff 486,769
53.6%
420,819
46.4%
Eliminated

 
 
County results
Hyde-Smith:      30–40%      40–50%      50–60%      60–70%      70–80%      80–90%
Espy:      30–40%      40–50%      50–60%      60–70%      70–80%      80–90%
McDaniel:      30–40%      40–50%

U.S. senator before election

Cindy Hyde-Smith
Republican

Elected U.S. Senator

Cindy Hyde-Smith
Republican

Seven-term Republican Thad Cochran, who won re-election with 59.9% of the vote in 2014, announced that he would resign since April 1, 2018 due to health reasons.[64] Phil Bryant, Governor of Mississippi, announced on March 21, 2018, that he would appoint Mississippi Agriculture Commissioner Cindy Hyde-Smith to fill the vacancy.[65] She ran in the special election.[29]

On November 6, a nonpartisan jungle primary took place on the same day as the regularly scheduled U.S. Senate election for the seat currently held by Roger Wicker. Party affiliations were not printed on the ballot.[66] As no candidate gained 50% of the votes, a runoff special election between the top two candidates - Hyde-Smith and former United States Secretary of Agriculture Mike Espy[29] - was held on November 27, 2018. Hyde-Smith won the runoff election.

Democrat Tobey Bartee[67] and Republican Chris McDaniel also contested the first round of the election.[29]

Mississippi special election
Party Candidate Votes %
Nonpartisan Cindy Hyde-Smith (incumbent) 389,995 41.25
Nonpartisan Mike Espy 386,742 40.90
Nonpartisan Chris McDaniel 154,878 16.38
Nonpartisan Tobey Bernard Bartee 13,852 1.47
Total votes 945,467 100.00
Mississippi special election runoff[32]
Party Candidate Votes % ±%
Nonpartisan Cindy Hyde-Smith (incumbent) 486,769 53.63% –6.27
Nonpartisan Mike Espy 420,819 46.37% +8.48
Total votes 907,588 100.00%
Republican hold

Missouri edit

Missouri election
 
← 2012
2024 →
Turnout58.23%
     
Nominee Josh Hawley Claire McCaskill
Party Republican Democratic
Popular vote 1,254,927 1,112,935
Percentage 51.38% 45.57%

 
Hawley:      40–50%      50–60%      60–70%      70–80%      80–90%
McCaskill:      40–50%      50–60%      60–70%      80–90%

U.S. senator before election

Claire McCaskill
Democratic

Elected U.S. senator

Josh Hawley
Republican

Two-term Democrat Claire McCaskill was re-elected with 55% of the vote in 2012. She was renominated.[68]

Attorney General Josh Hawley[68] won the Republican nomination.[69] Japheth Campbell declared his candidacy for the Libertarian nomination.[68]

Polls showed a close race for months leading up to the election. Hawley defeated McCaskill in the general election.[70]

Missouri Democratic primary
Party Candidate Votes %
Democratic Claire McCaskill (incumbent) 501,872 82.60
Democratic Carla Wright 41,126 6.77
Democratic David Faust 15,984 2.63
Democratic John Hogan 15,958 2.63
Democratic Angelica Earl 15,500 2.55
Democratic Travis Gonzalez 9,480 1.56
Democratic Leonard Joseph Steinman II 7,657 1.26
Total votes 607,577 100.00
Missouri Republican primary
Party Candidate Votes %
Republican Josh Hawley 389,978 58.64
Republican Tony Monetti 64,834 9.75
Republican Austin Petersen 54,916 8.26
Republican Kristi Nichols 49,640 7.47
Republican Christina Smith 35,024 5.27
Republican Ken Patterson 19,579 2.94
Republican Peter Pfeifer 16,594 2.50
Republican Courtland Sykes 13,870 2.09
Republican Fred Ryman 8,781 1.32
Republican Brian G. Hagg 6,871 1.03
Republican Bradley Krembs 4,902 0.74
Total votes 664,889 100.00
Missouri general election
2018, united, states, senate, elections, related, races, 2018, united, states, elections, were, held, november, 2018, among, seats, class, were, contested, regular, elections, while, others, were, contested, special, elections, senate, vacancies, minnesota, mi. For related races see 2018 United States elections The 2018 United States Senate elections were held on November 6 2018 Among the 100 seats the 33 of Class 1 were contested in regular elections while 2 others were contested in special elections due to Senate vacancies in Minnesota and Mississippi The regular election winners were elected to 6 year terms running from January 3 2019 to January 3 2025 Senate Democrats had 26 seats up for election including the seats of 2 independents who caucus with them while Senate Republicans had 9 seats up for election 2018 United States Senate elections 2016 November 6 2018November 27 Mississippi runoff 2020 2017 AL 35 of the 100 seats in the United States Senate51 seats needed for a majority Majority party Minority party Leader Mitch McConnell Chuck Schumer Party Republican Democratic Leader since January 3 2007 January 3 2017 Leader s seat Kentucky New York Seats before 51 47 Seats after 53 45 Seat change 2 2 Popular vote 34 687 875 52 224 867 a b Percentage 38 7 58 2 Seats up 9 24 Races won 11 22 Third party Party Independent Seats before 2 c Seats after 2 Seat change Popular vote 808 370 d Percentage 0 9 Seats up 2 Races won 2Results of the elections Democratic gain Republican gain Democratic hold Republican hold Independent hold No election Rectangular inset Minn amp Miss both seats up for electionMajority Leader before election Mitch McConnell Republican Elected Majority Leader Mitch McConnell Republican To maintain their working majority of 50 senators and their party s vice president s tie breaking vote Republicans could only afford a net loss of 1 seat in these elections The Republicans had a 52 48 majority after the 2016 elections but they lost a seat in Alabama in December 2017 after Jeff Sessions resigned to become U S attorney general and Doug Jones a Democrat won in the subsequent special election Three Republican held seats were open as a result of retirements in Tennessee Utah and Arizona Although every Democratic incumbent ran for re election Democrats faced an extremely unfavorable map defending 26 seats of which 10 were in states won by Donald Trump in the 2016 presidential election and 5 of those where Trump had won by more than 10 Republicans however only had to defend 9 seats of which only 1 was in a state won by Hillary Clinton in 2016 The Republicans increased their majority by defeating Democratic incumbents in Florida Indiana Missouri and North Dakota and holding the open seats in Tennessee and Utah In contrast Democrats won 2 Republican held seats defeating an incumbent in Nevada and winning the open seat in Arizona This was the first election cycle since 2002 in which the incumbent president s party gained seats in the Senate The results for this election cycle were the only significant gains made by the Republicans in what was otherwise characterized as a blue wave election The Republican gains in the Senate and the Democratic gains in the House marked the first mid term election cycle since 1970 in which the president s party made net gains in one chamber of Congress while suffering net losses in the other 3 which also occurred in 1914 1962 and 2022 This was the first mid term election cycle since 2002 in which any incumbents of the non presidential party lost re election The number of defeated non presidential party incumbents 4 was the most since the 1934 mid terms 4 As of February 2024 this is the last time Republicans either won control of the Senate and or made net gains in the chamber Contents 1 Partisan composition 2 Results summary 3 Change in composition 3 1 Before the elections 3 2 After the elections 4 Final pre election predictions 5 Election dates 6 Gains and losses 6 1 Retirements 6 2 Defeats 6 3 Post election changes 7 Race summary 7 1 Special elections during the preceding Congress 7 2 Elections leading to the next Congress 8 Closest races 9 Arizona 10 California 11 Connecticut 12 Delaware 13 Florida 14 Hawaii 15 Indiana 16 Maine 17 Maryland 18 Massachusetts 19 Michigan 20 Minnesota 20 1 Minnesota regular 20 2 Minnesota special 21 Mississippi 21 1 Mississippi regular 21 2 Mississippi special 22 Missouri 23 Montana 24 Nebraska 25 Nevada 26 New Jersey 27 New Mexico 28 New York 29 North Dakota 30 Ohio 31 Pennsylvania 32 Rhode Island 33 Tennessee 34 Texas 35 Utah 36 Vermont 37 Virginia 38 Washington 39 West Virginia 40 Wisconsin 41 Wyoming 42 See also 43 Notes 44 ReferencesPartisan composition editAmong the 33 Class 1 Senate seats up for regular election in 2018 twenty three were held by Democrats two by independents who caucused with the Senate Democrats and eight by Republicans Class Two seats in Minnesota and Mississippi held by interim appointees were also up for election both incumbent appointees sought election to finish their unexpired terms Democrats targeted Republican held Senate seats in Arizona open seat and Nevada 5 Seats in Texas 6 Mississippi at least one of the two seats and Tennessee open seat 7 were also competitive for the Democrats Republicans targeted Democratic held seats in Indiana Missouri Montana North Dakota and West Virginia all of which were won by Republicans in both the 2012 and 2016 presidential elections 8 Seats in Florida Ohio Pennsylvania Wisconsin and Michigan all of which were won by Obama in 2008 and 2012 but by Trump in 2016 were also targeted by Republicans 5 9 The Democratic held seat in New Jersey was also considered unexpectedly competitive due to corruption allegations surrounding the Democratic incumbent The map was widely characterized as extremely unfavorable to Democrats as Democrats were defending 26 states while Republicans were defending nine Of these seats Democrats were defending ten in states won by Donald Trump in the 2016 presidential election while Republicans were only defending one seat in a state won by Hillary Clinton in 2016 10 11 12 According to FiveThirtyEight Democrats faced the most unfavorable Senate map in 2018 that any party has ever faced in any election 13 14 Results summary editParties Total Democratic Republican Independent Libertarian Green Other Last elections 2016 46 52 2 0 0 0 100 Before these elections 47 51 2 0 0 0 100 Not up 23 42 0 65 Class 2 2014 2020 11 20 0 31 Class 3 2016 2022 12 22 0 34 Up 24 9 2 35 Class 1 2012 2018 23 8 2 33 Special Class 2 1 1 0 2 Regular elections Incumbent retired 0 3 0 3 Held by same party 2 2 Replaced by other party nbsp 1 Republican replaced by nbsp 1 Democrat nbsp nbsp nbsp nbsp 1 Result 1 2 0 0 0 0 3 Incumbent ran 23 5 2 30 Won re election 19 4 2 25 Lost re election nbsp 1 Republican replaced by nbsp 1 Democrat nbsp 4 Democrats replaced by nbsp 4 Republicans nbsp nbsp nbsp nbsp 5 Result 20 8 2 0 0 0 30 Special elections Appointee ran 1 1 2 Appointee elected 1 1 2 Result 1 1 0 0 0 0 2 Total elected 22 11 2 0 0 0 35 Net gain loss nbsp 2 nbsp 2 nbsp nbsp nbsp nbsp 2 Nationwide vote 52 224 867 34 722 926 808 370 590 051 200 599 1 262 765 90 473 222 Share 58 17 38 67 0 90 0 66 0 22 1 41 100 Result 45 53 2 0 0 0 100 Source Clerk of the U S House of Representatives 1 Change in composition editEach block represents one of the one hundred seats in the Senate D is a Democratic senator I is an independent senator and R is a Republican senator Arranged so parties are separated and a majority is clear by crossing the middle Before the elections edit Each block indicates an incumbent senator s actions going into the election Some Ran for re election some Retired and those without a note were not up for election this cycle Before the elections Republicans held 51 seats Democrats held 47 and Independents held 2 After the 2017 Senate special election in Alabama on the start of the second session in the 115th Congress D1Ala Gain D2 D3 D4 D5 D6 D7 D8 D9 D10 D20 D19 D18 D17 D16 D15 D14 D13 D12 D11 D21 D22 D23 D24Calif Ran D25Conn Ran D26Del Ran D27Fla Ran D28Hawaii Ran D29Ind Ran D30Md Ran D40N D Ran D39N Y Ran D38N M Ran D37N J Ran D36Mont Ran D35Mo Ran D34Minn sp Ran D33Minn reg Ran D32Mich Ran D31Mass Ran D41Ohio Ran D42Penn Ran D43R I Ran D44Va Ran D45Wash Ran D46W Va Ran D47Wis Ran I1Maine Ran I2Vt Ran R51Wyo Ran Majority R41 R42 R43Ariz Retired R44Miss reg Ran R45Miss sp Ran R46Neb Ran R47Nev Ran R48Tenn Retired R49Texas Ran R50Utah Retired R40 R39 R38 R37 R36 R35 R34 R33 R32 R31 R21 R22 R23 R24 R25 R26 R27 R28 R29 R30 R20 R19 R18 R17 R16 R15 R14 R13 R12 R11 R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 After the elections edit Some senators were Re elected some were a Gain in the seat from the other party either by beating an incumbent or by winning an open seat some were a Hold by the same party but with a different senator and those without a note were not up for election this year After these elections Democrats had 45 seats independents had 2 and Republicans had 53 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D20 D19 D18 D17 D16 D15 D14 D13 D12 D11 D21 D22 D23 D24Calif Re elected D25Conn Re elected D26Del Re elected D27Hawaii Re elected D28Md Re elected D29Mass Re elected D30Mich Re elected D40Va Re elected D39R I Re elected D38Pa Re elected D37Ohio Re elected D36N Y Re elected D35N M Re elected D34N J Re elected D33Mont Re elected D32Minn sp Elected e D31Minn reg Re elected D41Wash Re elected D42W Va Re elected D43Wis Re elected D44Ariz Gain D45Nev Gain I1Maine Re elected I2Vt Re elected R53N D Gain R52Mo Gain R51Ind Gain Majority R41 R42 R43Miss reg Re elected R44Miss sp Elected e R45Neb Re elected R46Tenn Hold R47Tex Re elected R48Utah Hold R49Wyo Re elected R50Fla Gain R40 R39 R38 R37 R36 R35 R34 R33 R32 R31 R21 R22 R23 R24 R25 R26 R27 R28 R29 R30 R20 R19 R18 R17 R16 R15 R14 R13 R12 R11 R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 Key D Democratic R Republican I Independent caucusing with DemocratsFinal pre election predictions editSeveral sites and individuals publish predictions of competitive seats These predictions look at factors such as the strength of the incumbent if the incumbent is running for re election and the other candidates and the state s partisan lean reflected in part by the state s Cook Partisan Voting Index rating The predictions assign ratings to each seat indicating the predicted advantage that a party has in winning that seat Most election predictors used tossup no advantage tilt used by some predictors advantage that is not quite as strong as lean lean slight advantage likely or favored significant but surmountable advantage safe or solid near certain chance of victory Constituency Incumbent 2018 election ratings State PVI 15 Senator Lastelection f CookOct 26 2018 16 IENov 1 2018 17 SabatoNov 5 2018 18 NYTNov 5 2018 19 Fox News g Nov 5 2018 20 CNNNov 2 2018 21 RCPNov 5 2018 22 Daily KosNov 5 2018 23 PoliticoNov 5 2018 24 538 h Nov 6 2018 25 Result Arizona R 5 Jeff Flake retiring 49 2 R Tossup Tilt D flip Lean D flip Tossup Tossup Tossup Tossup Tossup Tossup Lean D flip Sinema50 0 D flip California D 12 Dianne Feinstein 62 5 D Safe D Safe D Safe D Safe D Likely D Safe D Safe D Safe D Safe D Safe D Feinstein54 2 D Connecticut D 6 Chris Murphy 54 8 D Safe D Safe D Safe D Safe D Likely D Safe D Safe D Safe D Safe D Safe D Murphy59 5 D Delaware D 6 Tom Carper 66 4 D Safe D Safe D Safe D Safe D Likely D Safe D Safe D Safe D Safe D Safe D Carper60 0 D Florida R 2 Bill Nelson 55 2 D Tossup Tilt D Lean D Tossup Tossup Tossup Tossup Tossup Tossup Lean D Scott50 1 R flip Hawaii D 18 Mazie Hirono 62 6 D Safe D Safe D Safe D Safe D Likely D Safe D Safe D Safe D Safe D Safe D Hirono71 2 D Indiana R 9 Joe Donnelly 50 0 D Tossup Tossup Lean R flip Tossup Tossup Tossup Tossup Tossup Tossup Lean D Braun50 7 R flip Maine D 3 Angus King 52 9 I Safe I Safe I Safe I Safe I Likely I Safe I Safe I Safe I Safe I Safe I King54 3 I Maryland D 12 Ben Cardin 56 0 D Safe D Safe D Safe D Safe D Likely D Safe D Safe D Safe D Safe D Safe D Cardin64 9 D Massachusetts D 12 Elizabeth Warren 53 7 D Safe D Safe D Safe D Safe D Likely D Safe D Safe D Safe D Safe D Safe D Warren60 3 D Michigan D 1 Debbie Stabenow 58 8 D Likely D Safe D Safe D Likely D Likely D Likely D Lean D Safe D Likely D Safe D Stabenow52 3 D Minnesota regular D 1 Amy Klobuchar 65 2 D Safe D Safe D Safe D Safe D Likely D Safe D Safe D Safe D Safe D Safe D Klobuchar60 3 D Minnesota special D 1 Tina Smith Appointed 2018 i Lean D Likely D Likely D Lean D Likely D Likely D Lean D Likely D Likely D Likely D Smith53 0 D Mississippi regular R 9 Roger Wicker 57 1 R Safe R Safe R Safe R Safe R Likely R Safe R Safe R Safe R Safe R Safe R Wicker58 5 R Mississippi special j R 9 Cindy Hyde Smith Appointed 2018 k Lean R Safe R Likely R Lean R Lean R Safe R Likely R Likely R Likely R Lean R Hyde Smith53 6 R Missouri R 9 Claire McCaskill 54 8 D Tossup Tilt R flip Lean R flip Tossup Tossup Tossup Tossup Tossup Tossup Tossup Hawley51 4 R flip Montana R 11 Jon Tester 48 6 D Tossup Tilt D Lean D Tossup Lean D Lean D Tossup Tossup Lean D Likely D Tester50 3 D Nebraska R 14 Deb Fischer 57 8 R Safe R Safe R Safe R Safe R Likely R Safe R Safe R Safe R Safe R Safe R Fischer57 7 R Nevada D 1 Dean Heller 45 9 R Tossup Tilt D flip Lean D flip Tossup Tossup Tossup Tossup Tossup Tossup Tossup Rosen50 4 D flip New Jersey D 7 Bob Menendez 58 9 D Tossup Likely D Likely D Tossup Lean D Lean D Lean D Lean D Lean D Likely D Menendez54 0 D New Mexico D 3 Martin Heinrich 51 0 D Safe D Safe D Safe D Safe D Likely D Safe D Safe D Safe D Safe D Safe D Heinrich54 1 D New York D 11 Kirsten Gillibrand 72 2 D Safe D Safe D Safe D Safe D Likely D Safe D Safe D Safe D Safe D Safe D Gillibrand67 0 D North Dakota R 16 Heidi Heitkamp 50 2 D Lean R flip Lean R flip Lean R flip Lean R flip Likely R flip Lean R flip Lean R flip Lean R flip Lean R flip Lean R flip Cramer55 4 R flip Ohio R 3 Sherrod Brown 50 7 D Likely D Safe D Likely D Likely D Likely D Likely D Lean D Likely D Likely D Safe D Brown53 4 D Pennsylvania EVEN Bob Casey Jr 53 7 D Likely D Safe D Safe D Likely D Likely D Likely D Likely D Safe D Likely D Safe D Casey55 7 D Rhode Island D 10 Sheldon Whitehouse 64 8 D Safe D Safe D Safe D Safe D Likely D Safe D Safe D Safe D Safe D Safe D Whitehouse61 5 D Tennessee R 14 Bob Corker retiring 64 9 R Tossup Lean R Lean R Tossup Lean R Tossup Tossup Lean R Lean R Likely R Blackburn54 7 R Texas R 8 Ted Cruz 56 5 R Tossup Likely R Lean R Tossup Lean R Lean R Lean R Lean R Lean R Likely R Cruz50 9 R Utah R 20 Orrin Hatch retiring 65 3 R Safe R Safe R Safe R Safe R Likely R Safe R Safe R Safe R Safe R Safe R Romney62 6 R Vermont D 15 Bernie Sanders 71 0 I Safe I Safe I Safe I Safe I Likely I Safe I Safe I Safe I Safe I Safe I Sanders67 4 I Virginia D 1 Tim Kaine 52 3 D Safe D Safe D Safe D Safe D Likely D Safe D Safe D Safe D Safe D Safe D Kaine57 0 D Washington D 7 Maria Cantwell 60 4 D Safe D Safe D Safe D Safe D Likely D Safe D Safe D Safe D Safe D Safe D Cantwell58 3 D West Virginia R 20 Joe Manchin 60 6 D Lean D Tilt D Lean D Lean D Lean D Lean D Tossup Lean D Lean D Likely D Manchin49 6 D Wisconsin EVEN Tammy Baldwin 51 4 D Likely D Safe D Likely D Likely D Likely D Likely D Lean D Likely D Likely D Safe D Baldwin55 4 D Wyoming R 25 John Barrasso 75 7 R Safe R Safe R Safe R Safe R Likely R Safe R Safe R Safe R Safe R Safe R Barrasso67 0 R Overall l D 43R 489 tossups D 48R 511 tossup D 48R 520 tossups D 43R 489 tossups D 45R 505 tossups D 45R 496 tossups D 43R 498 tossups D 44R 506 tossups D 45R 505 tossups D 48R 502 tossups Results D 47R 53Election dates editThese are the election dates for the regularly scheduled general elections State Filingdeadline 26 Primaryelection 27 Primaryrun off if necessary 27 Generalelection Poll closing Eastern Time 28 Arizona May 30 2018 August 28 2018 N A November 6 2018 9pm California March 9 2018 June 5 2018 N A November 6 2018 11pm Connecticut June 12 2018 August 14 2018 N A November 6 2018 8pm Delaware July 10 2018 September 6 2018 N A November 6 2018 8pm Florida May 4 2018 August 28 2018 N A November 6 2018 7pm and 8pm Hawaii June 5 2018 August 11 2018 N A November 6 2018 11pm Indiana February 9 2018 May 8 2018 N A November 6 2018 6pm and 7pm Maine March 15 2018 June 12 2018 N A November 6 2018 8pm Maryland February 27 2018 June 26 2018 N A November 6 2018 8pm Massachusetts June 5 2018 September 4 2018 N A November 6 2018 8pm Michigan April 24 2018 August 7 2018 N A November 6 2018 8pm and 9pm Minnesota June 5 2018 August 14 2018 N A November 6 2018 9pm Mississippi March 1 2018 June 5 2018 June 26 2018 November 6 2018 8pm Mississippi special March 26 2018 November 6 2018 N A November 27 2018 m 8pm Missouri March 27 2018 August 7 2018 N A November 6 2018 8pm Montana March 12 2018 June 5 2018 N A November 6 2018 10pm Nebraska March 1 2018 May 15 2018 N A November 6 2018 9pm Nevada March 16 2018 June 12 2018 N A November 6 2018 10pm New Jersey April 2 2018 June 5 2018 N A November 6 2018 8pm New Mexico March 13 2018 June 5 2018 N A November 6 2018 9pm New York April 12 2018 June 26 2018 N A November 6 2018 9pm North Dakota April 9 2018 June 12 2018 N A November 6 2018 8pm and 9pm Ohio February 7 2018 May 8 2018 N A November 6 2018 7 30pm Pennsylvania March 20 2018 May 15 2018 N A November 6 2018 8pm Rhode Island June 27 2018 September 12 2018 N A November 6 2018 8pm Tennessee April 5 2018 August 2 2018 N A November 6 2018 8pm Texas December 11 2017 March 6 2018 May 22 2018 unnecessary November 6 2018 8pm and 9pm Utah March 15 2018 June 26 2018 N A November 6 2018 10pm Vermont May 31 2018 August 14 2018 N A November 6 2018 7pm Virginia March 29 2018 June 12 2018 N A November 6 2018 7pm Washington May 18 2018 August 7 2018 N A November 6 2018 11pm West Virginia January 27 2018 May 8 2018 N A November 6 2018 7 30pm Wisconsin June 1 2018 August 14 2018 N A November 6 2018 9pm Wyoming June 1 2018 August 21 2018 N A November 6 2018 9pmGains and losses editRetirements edit Three Republicans retired instead of seeking re election State Senator Replaced by Arizona Jeff Flake Kyrsten Sinema Tennessee Bob Corker Marsha Blackburn Utah Orrin Hatch Mitt Romney Defeats edit Four Democrats and one Republican sought re election but lost in the general election State Senator Replaced by Florida Bill Nelson Rick Scott Indiana Joe Donnelly Mike Braun Missouri Claire McCaskill Josh Hawley Nevada Dean Heller Jacky Rosen North Dakota Heidi Heitkamp Kevin Cramer Post election changes edit One Republican resigned before the start of the 116th Congress on December 31 2018 one other Republican also resigned during the 116th Congress due to health reasons Initially all were replaced by Republican appointees State Senator Replaced by Arizona Class 3 Jon Kyl Martha McSally Georgia Class 3 Johnny Isakson Kelly LoefflerRace summary editSpecial elections during the preceding Congress edit In these special elections the winners will be seated before January 3 2019 when elected and qualified They are ordered by election date then by state and by class State linked tosummaries below Incumbent Results Candidates Senator Party Electoralhistory Minnesota Class 2 Tina Smith DFL 2018 Appointed Interim appointee elected nbsp Y Tina Smith DFL 53 0 Karin Housley Republican 42 4 Sarah Wellington Legal Marijuana Now 3 7 Jerry Trooien Independent 0 9 Mississippi Class 2 Cindy Hyde Smith Republican 2018 Appointed Interim appointee elected nbsp Y Cindy Hyde Smith Republican 53 6 29 Mike Espy Democratic 46 4 29 Elections leading to the next Congress edit In these general elections the winners were elected for the term beginning January 3 2019 All of the elections involve the Class 1 seats and they are ordered by state State linked tosummaries below Incumbent Results Candidates Senator Party Electoralhistory Arizona Jeff Flake Republican 2012 Incumbent retired New senator elected Democratic gain nbsp Y Kyrsten Sinema Democratic 50 0 Martha McSally Republican 47 6 Angela Green Green 2 4 California Dianne Feinstein Democratic 1992 special 1994200020062012 Incumbent re elected nbsp Y Dianne Feinstein Democratic 54 2 Kevin de Leon Democratic 45 8 Connecticut Chris Murphy Democratic 2012 Incumbent re elected nbsp Y Chris Murphy Democratic 59 5 Matthew Corey Republican 39 4 Richard Lion Libertarian 0 6 Jeff Russell Green 0 5 Delaware Tom Carper Democratic 200020062012 Incumbent re elected nbsp Y Tom Carper Democratic 60 0 Robert Arlett Republican 37 8 Demitri Theodoropoulos Green 1 2 Nadine Frost Libertarian 1 1 Florida Bill Nelson Democratic 200020062012 Incumbent lost re election New senator elected Republican gain Winner delayed term until January 8 2019 to finish his term as Governor of Florida nbsp Y Rick Scott Republican 50 1 Bill Nelson Democratic 49 9 Hawaii Mazie Hirono Democratic 2012 Incumbent re elected nbsp Y Mazie Hirono Democratic 71 2 Ron Curtis Republican 28 8 Indiana Joe Donnelly Democratic 2012 Incumbent lost re election New senator elected Republican gain nbsp Y Mike Braun Republican 50 9 Joe Donnelly Democratic 45 0 Lucy Brenton Libertarian 4 0 Maine Angus King Independent 2012 Incumbent re elected nbsp Y Angus King Independent 54 3 Eric Brakey Republican 35 2 Zak Ringelstein Democratic 10 4 Maryland Ben Cardin Democratic 20062012 Incumbent re elected nbsp Y Ben Cardin Democratic 64 9 Tony Campbell Republican 30 3 Neal Simon Independent 3 7 Arvin Vohra Libertarian 1 Michael Puskar Independent write in Massachusetts Elizabeth Warren Democratic 2012 Incumbent re elected nbsp Y Elizabeth Warren Democratic 60 4 Geoff Diehl Republican 36 2 Shiva Ayyadurai Independent 3 4 Michigan Debbie Stabenow Democratic 200020062012 Incumbent re elected nbsp Y Debbie Stabenow Democratic 52 3 John James Republican 45 8 Marcia Squier Independent 1 George Huffman III Constitution 0 6 John Wilhelm Natural Law 0 4 Minnesota Amy Klobuchar DFL 20062012 Incumbent re elected nbsp Y Amy Klobuchar DFL 60 3 Jim Newberger Republican 36 2 Dennis Schuller Legal Marijuana Now 2 5 Paula M Overby Green 0 9 Mississippi Roger Wicker Republican 2007 Appointed 2008 special 2012 Incumbent re elected nbsp Y Roger Wicker Republican 58 5 David Baria Democratic 39 5 Danny Bedwell Libertarian 1 4 Shawn O Hara Reform 0 6 Missouri Claire McCaskill Democratic 20062012 Incumbent lost re election New senator elected Republican gain nbsp Y Josh Hawley Republican 51 4 Claire McCaskill Democratic 45 6 Craig O Dear Independent 1 4 Japheth Campbell Libertarian 1 1 Jo Crain Green 0 5 Montana Jon Tester Democratic 20062012 Incumbent re elected nbsp Y Jon Tester Democratic 50 3 Matt Rosendale Republican 46 8 Rick Breckenridge Libertarian 2 9 Nebraska Deb Fischer Republican 2012 Incumbent re elected nbsp Y Deb Fischer Republican 57 7 Jane Raybould Democratic 38 6 Jim Schultz Libertarian 3 7 Nevada Dean Heller Republican 2011 Appointed 2012 Incumbent lost re election New senator elected Democratic gain nbsp Y Jacky Rosen Democratic 50 4 Dean Heller Republican 45 4 Barry Michaels Independent 1 Tim Hagan Libertarian 0 9 Kamau Bakari Independent American 0 7 New Jersey Bob Menendez Democratic 2006 Appointed 20062012 Incumbent re elected nbsp Y Bob Menendez Democratic 54 0 Bob Hugin Republican 42 8 Madelyn Hoffman Green 0 8 Murray Sabrin Libertarian 0 7 Others Natalie Rivera For The People 0 6 Tricia Flanagan New Day NJ 0 5 Kevin Kimple Make It Simple 0 3 Hank Schroeder Economic Growth 0 3 New Mexico Martin Heinrich Democratic 2012 Incumbent re elected nbsp Y Martin Heinrich Democratic 54 1 Mick Rich Republican 30 5 Gary Johnson Libertarian 15 4 New York Kirsten Gillibrand Democratic 2009 Appointed 2010 special 2012 Incumbent re elected nbsp Y Kirsten Gillibrand Democratic 67 0 Chele Chiavacci Farley Republican 33 0 North Dakota Heidi Heitkamp Democratic NPL 2012 Incumbent lost re election New senator elected Republican gain nbsp Y Kevin Cramer Republican 55 5 Heidi Heitkamp Democratic NPL 44 5 Ohio Sherrod Brown Democratic 20062012 Incumbent re elected nbsp Y Sherrod Brown Democratic 53 4 Jim Renacci Republican 46 6 Pennsylvania Bob Casey Jr Democratic 20062012 Incumbent re elected nbsp Y Bob Casey Jr Democratic 55 7 Lou Barletta Republican 42 6 Dale Kerns Libertarian 1 Neal Gale Green 0 6 Rhode Island Sheldon Whitehouse Democratic 20062012 Incumbent re elected nbsp Y Sheldon Whitehouse Democratic 61 6 Robert Flanders Republican 38 4 Tennessee Bob Corker Republican 20062012 Incumbent retired New senator elected Republican hold nbsp Y Marsha Blackburn Republican 54 7 Phil Bredesen Democratic 43 9 Others Trudy Austin Independent 0 4 Dean Hill Independent 0 4 Kris Todd Independent 0 2 John Carico Independent 0 2 Breton Phillips Independent 0 1 Kevin McCants Independent 0 1 Texas Ted Cruz Republican 2012 Incumbent re elected nbsp Y Ted Cruz Republican 50 9 Beto O Rourke Democratic 48 3 Neal Dikeman Libertarian 0 8 Utah Orrin Hatch Republican 1976198219881994200020062012 Incumbent retired New senator elected Republican hold nbsp Y Mitt Romney Republican 62 6 Jenny Wilson Democratic 30 9 Tim Aalders Constitution 2 7 Craig Bowden Libertarian 2 6 Reed McCandless Independent American 1 2 Vermont Bernie Sanders Independent 20062012 Incumbent re elected nbsp Y Bernie Sanders Independent 67 4 Lawrence Zupan Republican 27 5 Virginia Tim Kaine Democratic 2012 Incumbent re elected nbsp Y Tim Kaine Democratic 57 1 Corey Stewart Republican 41 1 Matt Waters Libertarian 1 8 Washington Maria Cantwell Democratic 200020062012 Incumbent re elected nbsp Y Maria Cantwell Democratic 58 3 Susan Hutchison Republican 41 5 West Virginia Joe Manchin Democratic 2010 special 2012 Incumbent re elected nbsp Y Joe Manchin Democratic 49 6 Patrick Morrisey Republican 46 3 Rusty Hollen Libertarian 4 1 Wisconsin Tammy Baldwin Democratic 2012 Incumbent re elected nbsp Y Tammy Baldwin Democratic 55 4 Leah Vukmir Republican 44 6 Wyoming John Barrasso Republican 2007 Appointed 2008 special 2012 Incumbent re elected nbsp Y John Barrasso Republican 67 1 Gary Trauner Democratic 30 1 Joe Porambo Libertarian 2 8 Closest races editIn twelve races the margin of victory was under 10 although in California the Senate race was fought between two members of the Democratic Party Dianne Feinstein and Kevin de Leon because of California s run off system State Party of winner Margin Florida Republican flip 0 12 Arizona Democratic flip 2 34 Texas Republican 2 57 West Virginia Democratic 3 31 Montana Democratic 3 55 Nevada Democratic flip 5 03 Missouri Republican flip 5 81 Indiana Republican flip 5 89 n Michigan Democratic 6 51 Ohio Democratic 6 85 Mississippi special Republican 7 27 California Democratic 8 33 o Arizona editArizona election nbsp 20122024 Turnout64 85 nbsp nbsp Nominee Kyrsten Sinema Martha McSally Party Democratic Republican Popular vote 1 191 100 1 135 200 Percentage 49 96 47 61 nbsp Sinema 50 60 60 70 McSally 50 60 60 70 70 80 U S senator before election Jeff Flake Republican Elected U S senator Kyrsten Sinema Democratic Main article 2018 United States Senate election in Arizona See also List of United States senators from Arizona One term Republican Jeff Flake was elected with 49 of the vote in 2012 He chose not to run for re election 30 U S Representative Martha McSally 31 won the Republican nomination in a three way primary on August 28 2018 against Joe Arpaio and Kelli Ward U S Representative Kyrsten Sinema 31 easily secured the Democratic nomination Sinema defeated McSally by a slim margin her victory became official only after six days of counting ballots Arizona Republican primary Party Candidate Votes Republican Martha McSally 357 626 54 57 Republican Kelli Ward 180 926 27 61 Republican Joe Arpaio 116 555 17 79 Write in 191 0 03 Total votes 655 298 100 00 Arizona Democratic primary Party Candidate Votes Democratic Kyrsten Sinema 404 170 79 25 Democratic Deedra Abboud 105 800 20 75 Total votes 509 970 100 00 Arizona general election 32 Party Candidate Votes Democratic Kyrsten Sinema 1 191 100 49 96 3 76 Republican Martha McSally 1 135 200 47 61 1 62 Green Angela Green 57 442 2 41 N A Write in 566 0 02 0 01 Total votes 2 384 308 100 00 Democratic gain from RepublicanCalifornia editCalifornia election nbsp 20122024 Turnout56 42 nbsp nbsp Nominee Dianne Feinstein Kevin de Leon Party Democratic Democratic Popular vote 6 019 422 5 093 942 Percentage 54 16 45 84 nbsp County resultsFeinstein 50 60 60 70 de Leon 50 60 60 70 70 80 U S senator before election Dianne Feinstein Democratic Elected U S senator Dianne Feinstein Democratic Main article 2018 United States Senate election in California See also List of United States senators from California Four term Democrat Dianne Feinstein won a special election in 1992 and was elected to full terms in 1994 2000 2006 and 2012 She ran for re election and advanced to the general election after securing the top spot in the June 5 jungle primary 33 The June 5 primary ballot listed 32 candidates Feinstein plus 31 challengers in addition to 3 write in candidates There were 10 Democratic candidates 11 Republican candidates one Libertarian one Peace and Freedom candidate and 9 independent candidates There was also a Green Party candidate who ran as a write in President pro tempore of the California State Senate Kevin de Leon advanced to the general election for the right to challenge Feinstein after securing the second spot in the primary 33 The 11 Republican candidates who ran in the primary combined for 33 2 of the vote The top Republican candidate James P Bradley received 8 3 of the vote which put him in 3rd place at 3 8 behind the second place finisher Kevin DeLeon 34 On November 6 Dianne Feinstein was elected to a fifth term defeating Kevin de Leon California blanket primary Party Candidate Votes Democratic Dianne Feinstein incumbent 2 947 035 44 18 Democratic Kevin de Leon 805 446 12 07 Republican James P Bradley 556 252 8 34 Republican Arun K Bhumitra 350 815 5 26 Republican Paul A Taylor 323 534 4 85 Republican Erin Cruz 267 494 4 01 Republican Tom Palzer 205 183 3 08 Democratic Alison Hartson 147 061 2 20 Republican Rocky De La Fuente 135 279 2 03 Democratic Pat Harris 126 947 1 90 Republican John Jack Crew 93 808 1 41 Republican Patrick Little 89 867 1 35 Republican Kevin Mottus 87 646 1 31 Republican Jerry Joseph Laws 67 140 1 01 Libertarian Derrick Michael Reid 60 000 0 90 Democratic Adrienne Nicole Edwards 56 172 0 84 Democratic Douglas Howard Pierce 42 671 0 64 Republican Mario Nabliba 39 209 0 59 Democratic David Hildebrand 30 305 0 45 Democratic Donnie O Turner 30 101 0 45 Democratic Herbert G Peters 27 468 0 41 No party preference David Moore 24 614 0 37 No party preference Ling Ling Shi 23 506 0 35 Peace and Freedom John Parker 22 825 0 34 No party preference Lee Olson 20 393 0 31 Democratic Gerald Plummer 18 234 0 27 No party preference Jason M Hanania 18 171 0 27 No party preference Don J Grundmann 15 125 0 23 No party preference Colleen Shea Fernald 13 536 0 20 No party preference Rash Bihari Ghosh 12 557 0 19 No party preference Tim Gildersleeve 8 482 0 13 No party preference Michael Fahmy Girgis 2 986 0 04 Write in 863 0 01 Total votes 6 670 720 100 00 California general election 32 Party Candidate Votes Democratic Dianne Feinstein incumbent 6 019 422 54 16 8 36 Democratic Kevin de Leon 5 093 942 45 84 N A Total votes 11 113 364 100 00 Democratic holdConnecticut editConnecticut election nbsp 20122024 Turnout63 58 nbsp nbsp Nominee Chris Murphy Matthew Corey Party Democratic Republican Popular vote 825 579 545 717 Percentage 59 53 39 35 nbsp County results nbsp Municipality resultsMurphy 40 50 50 60 60 70 70 80 80 90 gt 90 Corey 40 50 50 60 60 70 U S senator before election Chris Murphy Democratic Elected U S senator Chris Murphy Democratic Main article 2018 United States Senate election in Connecticut See also List of United States senators from Connecticut One term Democrat Chris Murphy was elected with 55 of the vote in 2012 He ran for re election 35 Businessmen Matthew Corey 36 received the Republican nomination Chris Murphy was elected to a second term winning nearly 60 of the vote 37 Connecticut Republican primary Party Candidate Votes Republican Matthew Corey 99 899 76 54 Republican Dominic Rapini 30 624 23 46 Total votes 130 523 100 00 Connecticut general election 32 Party Candidate Votes Democratic Chris Murphy incumbent 825 579 59 53 4 71 Republican Matthew Corey 545 717 39 35 3 72 Libertarian Richard Lion 8 838 0 64 1 02 Green Jeff Russell 6 618 0 48 N A Write in 88 0 01 0 44 Total votes 1 386 840 100 00 Democratic holdDelaware editDelaware election nbsp 20122024 Turnout52 18 nbsp nbsp Nominee Tom Carper Rob Arlett Party Democratic Republican Popular vote 217 385 137 127 Percentage 59 95 37 81 nbsp Carper 50 60 60 70 Arlett 50 60 U S senator before election Tom Carper Democratic Elected U S senator Tom Carper Democratic Main article 2018 United States Senate election in Delaware See also List of United States senators from Delaware Three term Democrat Tom Carper won re election with 66 of the vote in 2012 He announced he was running for re election during an interview on MSNBC on July 24 2017 38 He defeated Dover community activist Kerri Evelyn Harris for the Democratic nomination Sussex County Councilman Robert Arlett won the Republican nomination 38 Tom Carper defeated Arlett winning 60 of the vote 39 Delaware Democratic primary Party Candidate Votes Democratic Tom Carper incumbent 53 635 64 59 Democratic Kerri Evelyn Harris 29 407 35 41 Total votes 83 042 100 00 Delaware Republican primary Party Candidate Votes Republican Rob Arlett 25 284 66 77 Republican Gene Truono 10 587 27 96 Republican Rocky De La Fuente 1 998 5 28 Total votes 37 870 100 00 Delaware general election 32 Party Candidate Votes Democratic Tom Carper incumbent 217 385 59 95 6 47 Republican Rob Arlett 137 127 37 82 8 87 Green Demitri Theodoropoulos 4 170 1 15 0 35 Libertarian Nadine Frost 3 910 1 08 N A Write in 14 0 00 N A Total votes 362 606 100 00 Democratic holdFlorida editFlorida election nbsp 20122024 Turnout61 68 nbsp nbsp Nominee Rick Scott Bill Nelson Party Republican Democratic Popular vote 4 099 505 4 089 472 Percentage 50 05 49 93 nbsp Scott 50 60 60 70 70 80 80 90 Nelson 50 60 60 70 U S senator before election Bill Nelson Democratic Elected U S senator Rick Scott Republican Main article 2018 United States Senate election in Florida See also List of United States senators from Florida Three term Democrat Bill Nelson was re elected with 55 of the vote in 2012 He sought re election to a fourth term in office 40 Florida Governor Rick Scott won the Republican nomination First elected in 2010 and re elected in 2014 Scott s term as Governor of Florida was set to end by January 2019 due to term limits 40 Edward Janowski was running as an independent but did not qualify 40 Scott led among ballots tallied on election night but given the close margins of the race recounts were ordered 41 Final recount numbers were released following a machine and hand recount with Rick Scott maintaining a lead 42 On November 18 Nelson conceded to Scott 43 Two days later election results were certified by the state cementing Scott s win 44 Florida Republican primary Party Candidate Votes Republican Rick Scott 1 456 187 88 61 Republican Rocky De La Fuente 187 209 11 39 Total votes 1 643 396 100 00 Florida general election 32 Party Candidate Votes Republican Rick Scott 4 099 505 50 05 7 82 Democratic Bill Nelson incumbent 4 089 472 49 93 5 30 Write in 1 028 0 01 0 01 Total votes 8 190 005 100 00 Republican gain from DemocraticHawaii editHawaii election nbsp 20122024 Turnout51 32 nbsp nbsp Nominee Mazie Hirono Ron Curtis Party Democratic Republican Popular vote 276 316 112 035 Percentage 71 15 28 85 nbsp County resultsHirono 60 70 70 80 U S senator before election Mazie Hirono Democratic Elected U S senator Mazie Hirono Democratic Main article 2018 United States Senate election in Hawaii See also List of United States senators from Hawaii One term Democrat Mazie Hirono was elected with 63 of the vote in 2012 She ran 45 Ron Curtis was the Republican nominee Hirono was elected to a second term by a landslide Hawaii Democratic primary Party Candidate Votes Democratic Mazie Hirono incumbent 201 679 100 00 Total votes 201 679 100 00 Hawaii Republican primary Party Candidate Votes Republican Ron Curtis 6 370 23 73 Republican Consuelo Anderson 5 172 19 26 Republican Robert C Helsham Sr 3 988 14 85 Republican Thomas E White 3 661 13 64 Republican Rocky De La Fuente 3 065 11 42 Republican George L Berish 1 658 6 18 Republican Michael R Hodgkiss 1 576 5 87 Republican Eddie Pirkowski 1 358 5 06 Total votes 26 848 100 00 Hawaii general election 32 Party Candidate Votes Democratic Mazie Hirono incumbent 276 316 71 15 8 55 Republican Ron Curtis 112 035 28 85 8 55 Total votes 388 351 100 00 Democratic holdIndiana editIndiana election nbsp 20122024 Turnout50 42 nbsp nbsp Nominee Mike Braun Joe Donnelly Party Republican Democratic Popular vote 1 158 000 1 023 553 Percentage 50 73 44 84 nbsp County resultsBraun 40 50 50 60 60 70 70 80 Donnelly 40 50 50 60 60 70 U S senator before election Joe Donnelly Democratic Elected U S senator Mike Braun Republican Main article 2018 United States Senate election in Indiana See also List of United States senators from Indiana One term Democrat Joe Donnelly was elected with 50 04 of the vote in 2012 He ran He won the Democratic primary unopposed 46 State Representative Mike Braun 46 won the May 8 Republican primary U S Representatives Luke Messer 47 and Todd Rokita 47 also ran for the Republican nomination James Johnson ran as an independent 46 Braun won election with 51 of the vote defeating Joe Donnelly 48 Indiana Democratic primary Party Candidate Votes Democratic Joe Donnelly incumbent 284 621 100 00 Total votes 284 621 100 00 Indiana Republican primary Party Candidate Votes Republican Mike Braun 208 602 41 17 Republican Todd Rokita 151 967 29 99 Republican Luke Messer 146 131 28 84 Total votes 506 700 100 00 Indiana general election 32 Party Candidate Votes Republican Mike Braun 1 158 000 50 73 6 45 Democratic Joe Donnelly incumbent 1 023 553 44 84 5 20 Libertarian Lucy Brenton 100 942 4 42 1 26 Write in 70 0 00 N A Total votes 2 282 565 100 00 Republican gain from DemocraticMaine editMaine election nbsp 20122024 Turnout59 96 nbsp nbsp nbsp Nominee Angus King Eric Brakey Zak Ringelstein Party Independent Republican Democratic Popular vote 344 575 223 502 66 268 Percentage 54 31 35 23 10 45 nbsp County results nbsp Municipality resultsKing 40 50 50 60 60 70 70 80 80 90 gt 90 Brakey 40 50 50 60 60 70 70 80 80 90 gt 90 Tie U S senator before election Angus King Independent Elected U S senator Angus King Independent Main article 2018 United States Senate election in Maine See also List of United States senators from Maine One term Independent Senator Angus King was elected in a three way race with 53 of the vote in 2012 King has caucused with the Democratic Party since taking office in 2013 but he has left open the possibility of caucusing with the Republican Party in the future 49 State Senator Eric Brakey ran unopposed for the Republican nomination 50 Public school teacher and founder of UClass Zak Ringelstein ran unopposed for the Democratic nomination 50 The election was conducted with ranked choice voting as opposed to First past the post voting after Maine voters passed a citizen referendum approving the change in 2016 51 and a June 2018 referendum sustaining the change 52 King was easily re elected with over 50 of the vote Maine Democratic primary Party Candidate Votes Democratic Zak Ringelstein 89 841 100 00 Total votes 89 841 100 00 Maine Republican primary Party Candidate Votes Republican Eric Brakey 59 853 100 00 Total votes 59 853 100 00 Maine general election 32 Party Candidate Votes Independent Angus King incumbent 344 575 54 31 1 42 Republican Eric Brakey 223 502 35 23 4 48 Democratic Zak Ringelstein 66 268 10 45 2 81 Write in 64 0 01 N A Total votes 634 409 100 00 Independent holdMaryland editMain article 2018 United States Senate election in Maryland See also List of United States senators from Maryland Maryland election nbsp 20122024 Turnout58 17 nbsp nbsp Nominee Ben Cardin Tony Campbell Party Democratic Republican Popular vote 1 491 614 697 107 Percentage 64 86 30 31 nbsp Cardin 40 50 50 60 60 70 70 80 80 90 gt 90 Campbell 50 60 70 80 U S senator before election Ben Cardin Democratic Elected U S senator Ben Cardin Democratic Two term Democrat Ben Cardin was re elected with 56 of the vote in 2012 He won the Democratic primary 53 Tony Campbell Evan Cronhardt Nnabu Eze Gerald Smith and Blaine Taylor 54 were seeking the Republican nomination with Campbell winning Arvin Vohra vice chairman of the Libertarian National Committee sought the Libertarian Party nomination 54 Independents Neal Simon 54 and Edward Shlikas citation needed and Michael B Puskar ran Cardin won re election to a third term in office 55 Maryland Democratic primary Party Candidate Votes Democratic Ben Cardin incumbent 477 441 80 28 Democratic Chelsea Manning 34 611 5 82 Democratic Jerome Segal 20 027 3 37 Democratic Debbie Wilson 18 953 3 19 Democratic Marcia H Morgan 16 047 2 70 Democratic Lih Young 9 874 1 66 Democratic Richard Vaughn 9 480 1 59 Democratic Erik Jetmir 8 259 1 39 Total votes 594 692 100 00 Maryland Republican primary Party Candidate Votes Republican Tony Campbell 51 426 29 22 Republican Chris Chaffee 42 328 24 05 Republican Christina J Grigorian 30 756 17 48 Republican John Graziani 15 435 8 77 Republican Blaine Taylor 8 848 5 03 Republican Gerald I Smith Jr 7 564 4 30 Republican Brian Charles Vaeth 5 411 3 07 Republican Evan M Cronhardt 4 445 2 53 Republican Bill Krehnbrink 3 606 2 05 Republican Nnabu Eze 3 442 1 96 Republican Albert Binyahmin Howard 2 720 1 55 Total votes 175 981 100 00 Maryland general election 32 Party Candidate Votes Democratic Ben Cardin incumbent 1 491 614 64 86 8 88 Republican Tony Campbell 697 017 30 31 3 98 Independent Neal Simon 85 964 3 74 N A Libertarian Arvin Vohra 22 943 1 00 0 22 Write in 2 351 0 10 0 00 Total votes 2 299 889 100 00 Democratic holdMassachusetts editMassachusetts election nbsp 20122024 Turnout59 17 nbsp nbsp Nominee Elizabeth Warren Geoff Diehl Party Democratic Republican Popular vote 1 633 371 979 210 Percentage 60 34 36 17 nbsp County results nbsp Municipality resultsWarren 40 50 50 60 60 70 70 80 80 90 gt 90 Diehl 40 50 50 60 60 70 U S senator before election Elizabeth Warren Democratic Elected U S senator Elizabeth Warren Democratic Main article 2018 United States Senate election in Massachusetts See also List of United States senators from Massachusetts One term Democrat Elizabeth Warren was elected with 54 of the vote in 2012 She ran for re election 56 State Representative Geoff Diehl 57 attorney and founder of Better for America John Kingston 57 and former Romney aide Beth Lindstrom 57 ran for the Republican nomination Diehl won the Republican nomination Shiva Ayyadurai 58 ran as an independent Shiva started as in early 2017 as the first Republican in the race but went independent in November 2017 Warren defeated Diehl winning a second term 59 Massachusetts Democratic primary Party Candidate Votes Democratic Elizabeth Warren incumbent 590 835 98 08 Write in 11 558 1 92 Total votes 602 393 100 00 Massachusetts Republican primary Party Candidate Votes Republican Geoff Diehl 144 043 55 15 Republican John Kingston III 69 636 26 66 Republican Beth Joyce Lindstrom 46 693 17 88 Write in 798 0 31 Total votes 261 170 100 00 Massachusetts general election 32 Party Candidate Votes Democratic Elizabeth Warren incumbent 1 633 371 60 34 6 60 Republican Geoff Diehl 979 210 36 17 10 02 Independent Shiva Ayyadurai 91 710 3 39 N A Write in 2 799 0 10 0 03 Total votes 2 707 090 100 00 Democratic holdMichigan editMichigan election nbsp 20122024 Turnout56 72 nbsp nbsp Nominee Debbie Stabenow John James Party Democratic Republican Popular vote 2 214 478 1 938 818 Percentage 52 26 45 76 nbsp Stabenow 40 50 50 60 60 70 70 80 James 40 50 50 60 60 70 70 80 U S senator before election Debbie Stabenow Democratic Elected U S senator Debbie Stabenow Democratic Main article 2018 United States Senate election in Michigan See also List of United States senators from Michigan Three term Democrat Debbie Stabenow was re elected with 59 of the vote in 2012 60 She was renominated without Democratic opposition On the Republican side businessman John James won the nomination 60 In the final months of the election polls showed the race was beginning to narrow Ultimately Stabenow was re elected defeating James with a majority of the vote Michigan Democratic primary Party Candidate Votes Democratic Debbie Stabenow incumbent 1 045 450 100 00 Total votes 1 045 450 100 00 Michigan Republican primary Party Candidate Votes Republican John James 518 564 54 67 Republican Sandy Pensler 429 885 45 32 Write in 57 0 01 Total votes 948 506 100 00 Michigan general election 32 Party Candidate Votes Democratic Debbie Stabenow incumbent 2 214 478 52 26 6 54 Republican John James 1 938 818 45 76 7 78 Green Marcia Squier 40 204 0 95 0 35 Constitution George Huffman III 27 251 0 64 0 08 Natural Law John Howard Wilhelm 16 502 0 39 0 15 Write in 18 0 00 0 00 Total votes 4 237 271 100 00 Democratic holdMinnesota editMinnesota regular edit Minnesota general election nbsp 20122024 Turnout63 89 nbsp nbsp Nominee Amy Klobuchar Jim Newberger Party Democratic DFL Republican Popular vote 1 566 174 940 437 Percentage 60 31 36 21 nbsp Klobuchar 40 50 50 60 60 70 70 80 Newberger 40 50 50 60 60 70 U S senator before election Amy Klobuchar Democratic DFL Elected U S senator Amy Klobuchar Democratic DFL Main article 2018 United States Senate election in Minnesota See also List of United States senators from Minnesota and 2018 United States Senate special election in Minnesota Two term Democrat Amy Klobuchar was re elected with 65 of the vote in 2012 She ran for re election 61 State Representative Jim Newberger 61 ran for the Republican nomination Klobuchar was easily re elected 62 Minnesota Democratic DFL primary Party Candidate Votes Democratic DFL Amy Klobuchar incumbent 557 306 95 70 Democratic DFL Steve Carlson 9 934 1 71 Democratic DFL Stephen A Emery 7 047 1 21 Democratic DFL David Robert Groves 4 511 0 77 Democratic DFL Leonard J Richards 3 552 0 61 Total votes 582 350 100 00 Minnesota Republican primary Party Candidate Votes Republican Jim Newberger 201 531 69 50 Republican Merrill Anderson 45 492 15 69 Republican Rae Hart Anderon 25 883 8 93 Republican Rocky De La Fuente 17 051 5 88 Total votes 289 957 100 00 Minnesota general election 32 Party Candidate Votes Democratic DFL Amy Klobuchar incumbent 1 566 174 60 31 4 92 Republican Jim Newberger 940 437 36 21 5 68 Legal Marijuana Now Dennis Schuller 66 236 2 55 N A Green Paula M Overby 23 101 0 89 N A Write in 931 0 04 0 05 Total votes 2 596 879 100 00 Democratic DFL hold Minnesota special edit Minnesota special election nbsp 20142020 Turnout63 66 nbsp nbsp Nominee Tina Smith Karin Housley Party Democratic DFL Republican Popular vote 1 370 540 1 095 777 Percentage 52 97 42 35 nbsp Smith 40 50 50 60 60 70 Housley 40 50 50 60 60 70 U S senator before election Tina Smith Democratic DFL Elected U S senator Tina Smith Democratic DFL Main article 2018 United States Senate special election in Minnesota See also List of United States senators from Minnesota and 2018 United States Senate election in Minnesota Two term Democrat Al Franken announced that he would resign in December 2017 following allegations of sexual harassment Mark Dayton Governor of Minnesota appointed Lt Gov Tina Smith on January 2 2018 as an interim Senator until the November 2018 election She defeated primary challenger Richard Painter in the Democratic primary held on August 14 Incumbent Tina Smith defeated Republican Karin Housley in the general election to finish the term ending January 3 2021 Minnesota Democratic DFL primary Party Candidate Votes Democratic DFL Tina Smith incumbent 433 705 76 06 Democratic DFL Richard Painter 78 193 13 71 Democratic DFL Ali Chehem Ali 18 897 3 31 Democratic DFL Gregg A Iverson 17 825 3 13 Democratic DFL Nick Leonard 16 529 2 90 Democratic DFL Christopher Lovell Seymore Sr 5 041 0 88 Total votes 570 190 100 00 Minnesota Republican primary Party Candidate Votes Republican Karin Housley 186 384 61 95 Republican Bob Anderson 107 102 35 60 Republican Nikolay Nikolayevich Bey 7 375 2 45 Total votes 300 861 100 00 Minnesota special election 32 Party Candidate Votes Democratic DFL Tina Smith incumbent 1 370 540 52 97 0 18 Republican Karin Housley 1 095 777 42 35 0 56 Legal Marijuana Now Sarah Wellington 95 614 3 70 N A Independent Jerry Trooien 24 324 0 94 N A Write in 1 101 0 04 0 00 Total votes 2 587 356 100 00 Democratic DFL holdMississippi editMississippi regular edit Mississippi general election nbsp 20122024 Turnout49 66 nbsp nbsp Nominee Roger Wicker David Baria Party Republican Democratic Popular vote 547 619 369 567 Percentage 58 49 39 47 nbsp Wicker 40 50 50 60 60 70 70 80 80 90 Baria 40 50 50 60 60 70 70 80 U S senator before election Roger Wicker Republican Elected U S senator Roger Wicker Republican Main article 2018 United States Senate election in Mississippi See also List of United States senators from Mississippi and 2018 United States Senate special election in Mississippi One term Republican Roger Wicker won re election with 57 of the vote in 2012 He was appointed in 2007 and won a special election in 2008 to serve the remainder of Trent Lott s term 29 David Baria 29 won the Democratic nomination in a run off on June 26 Wicker was easily re elected 63 Mississippi Republican primary Party Candidate Votes Republican Roger Wicker incumbent 130 118 82 79 Republican Richard Boyanton 27 052 17 21 Total votes 157 170 100 00 Mississippi Democratic primary Party Candidate Votes Democratic Howard Sherman 27 957 31 79 Democratic David Baria 27 244 30 98 Democratic Omeria Scott 21 278 24 20 Democratic Victor G Maurice Jr 4 361 4 96 Democratic Jerome Garland 4 266 4 85 Democratic Jensen Bohren 2 825 3 21 Total votes 87 931 100 00 Mississippi Democratic primary runoff Party Candidate Votes Democratic David Baria 44 156 58 64 Democratic Howard Sherman 31 149 41 36 Total votes 75 305 100 00 Mississippi general election 32 Party Candidate Votes Republican Roger Wicker incumbent 547 619 58 49 1 33 Democratic David Baria 369 567 39 47 1 08 Libertarian Danny Bedwell 12 981 1 39 N A Reform Shawn O Hara 6 048 0 65 0 58 Total votes 936 215 100 00 Republican hold Mississippi special edit 2018 United States Senate special election in Mississippi nbsp 2014 November 6 2018 first round November 27 2018 runoff 2020 Turnout48 14 nbsp nbsp nbsp Candidate Cindy Hyde Smith Mike Espy Chris McDaniel Party Republican Democratic Republican First round 389 99541 2 386 74240 9 154 87816 4 Runoff 486 76953 6 420 81946 4 Eliminated nbsp First round county results nbsp Runoff county resultsCounty resultsHyde Smith 30 40 40 50 50 60 60 70 70 80 80 90 Espy 30 40 40 50 50 60 60 70 70 80 80 90 McDaniel 30 40 40 50 U S senator before election Cindy Hyde Smith Republican Elected U S Senator Cindy Hyde Smith RepublicanMain article 2018 United States Senate special election in Mississippi See also List of United States senators from Mississippi and 2018 United States Senate election in Mississippi Seven term Republican Thad Cochran who won re election with 59 9 of the vote in 2014 announced that he would resign since April 1 2018 due to health reasons 64 Phil Bryant Governor of Mississippi announced on March 21 2018 that he would appoint Mississippi Agriculture Commissioner Cindy Hyde Smith to fill the vacancy 65 She ran in the special election 29 On November 6 a nonpartisan jungle primary took place on the same day as the regularly scheduled U S Senate election for the seat currently held by Roger Wicker Party affiliations were not printed on the ballot 66 As no candidate gained 50 of the votes a runoff special election between the top two candidates Hyde Smith and former United States Secretary of Agriculture Mike Espy 29 was held on November 27 2018 Hyde Smith won the runoff election Democrat Tobey Bartee 67 and Republican Chris McDaniel also contested the first round of the election 29 Mississippi special election Party Candidate Votes Nonpartisan Cindy Hyde Smith incumbent 389 995 41 25 Nonpartisan Mike Espy 386 742 40 90 Nonpartisan Chris McDaniel 154 878 16 38 Nonpartisan Tobey Bernard Bartee 13 852 1 47 Total votes 945 467 100 00 Mississippi special election runoff 32 Party Candidate Votes Nonpartisan Cindy Hyde Smith incumbent 486 769 53 63 6 27 Nonpartisan Mike Espy 420 819 46 37 8 48 Total votes 907 588 100 00 Republican holdMissouri editMissouri election nbsp 20122024 Turnout58 23 nbsp nbsp Nominee Josh Hawley Claire McCaskill Party Republican Democratic Popular vote 1 254 927 1 112 935 Percentage 51 38 45 57 nbsp Hawley 40 50 50 60 60 70 70 80 80 90 McCaskill 40 50 50 60 60 70 80 90 U S senator before election Claire McCaskill Democratic Elected U S senator Josh Hawley Republican Main article 2018 United States Senate election in Missouri See also List of United States senators from Missouri Two term Democrat Claire McCaskill was re elected with 55 of the vote in 2012 She was renominated 68 Attorney General Josh Hawley 68 won the Republican nomination 69 Japheth Campbell declared his candidacy for the Libertarian nomination 68 Polls showed a close race for months leading up to the election Hawley defeated McCaskill in the general election 70 Missouri Democratic primary Party Candidate Votes Democratic Claire McCaskill incumbent 501 872 82 60 Democratic Carla Wright 41 126 6 77 Democratic David Faust 15 984 2 63 Democratic John Hogan 15 958 2 63 Democratic Angelica Earl 15 500 2 55 Democratic Travis Gonzalez 9 480 1 56 Democratic Leonard Joseph Steinman II 7 657 1 26 Total votes 607 577 100 00 Missouri Republican primary Party Candidate Votes Republican Josh Hawley 389 978 58 64 Republican Tony Monetti 64 834 9 75 Republican Austin Petersen 54 916 8 26 Republican Kristi Nichols 49 640 7 47 Republican Christina Smith 35 024 5 27 Republican Ken Patterson 19 579 2 94 Republican Peter Pfeifer 16 594 2 50 Republican Courtland Sykes 13 870 2 09 Republican Fred Ryman 8 781 1 32 Republican Brian G Hagg 6 871 1 03 Republican Bradley Krembs 4 902 0 74 Total votes 664 889 100 00 Missouri general election a h, wikipedia, wiki, book, books, library,

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