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2018 United States Senate election in Missouri

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The 2018 United States Senate election in Missouri took place on November 6, 2018, to elect a member of the United States Senate to represent the State of Missouri, concurrently with other elections to the United States Senate, elections to the United States House of Representatives, and various state and local elections, including Missouri's quadrennial State Auditor election.

Quick facts Turnout, Nominee ...
2018 United States Senate election in Missouri

 2012
November 6, 2018
2024 
Turnout58.2% Decrease[1]
 
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%      >90%
McCaskill:      40–50%      50–60%      60–70%      70–80%      80–90%      >90%
Tie:      40–50%      50%      No votes

U.S. senator before election

Claire McCaskill
Democratic

Elected U.S. Senator

Josh Hawley
Republican

Close

This was one of ten Democratic-held Senate seats up for election in a state Donald Trump won in the 2016 presidential election. Incumbent Democratic Senator Claire McCaskill ran for re-election to a third term. McCaskill easily won her party's nomination, defeating several minor candidates in the primary, while Missouri Attorney General Josh Hawley comfortably won the Republican primary.[2]

The candidate filing deadline was March 27, 2018, and the primary election was held on August 7, 2018.[3] Pollsters predicted a tight race; however, Hawley defeated McCaskill on election day by 5.8%, taking 51.4% of the vote to McCaskill's 45.6%, a somewhat larger margin than expected. This resulted in Republicans holding both Senate seats in Missouri for the first time since McCaskill took office in 2007. Hawley was also the youngest incumbent senator at that time, and continued to be until the inauguration of Jon Ossoff in 2021.[4] Despite her loss, McCaskill outperformed Hillary Clinton's performance in the state in the 2016 presidential race. This is the last U.S. Senate race in Missouri where the incumbent was defeated.

Democratic primary

Candidates

Nominated

Eliminated in primary

  • Angelica Earl, former insurance verification specialist[7]
  • David Faust[8]
  • Travis Gonzalez, perennial candidate[8]
  • John Hogan, perennial candidate[8]
  • Leonard Steinman, perennial candidate[8]
  • Carla (Coffee) Wright

Endorsements

Claire McCaskill
U.S. executive branch officials
U.S. senators
State officials

Results

Results by county:
  McCaskill
  •   80–90%
  •   70–80%
  •   60–70%
  •   50–60%
More information Party, Candidate ...
Democratic primary results[16]
Party Candidate Votes %
Democratic Claire McCaskill (incumbent) 501,872 82.60%
Democratic Carla Wright 41,126 6.77%
Democratic John Hogan 15,984 2.63%
Democratic David Faust 15,958 2.63%
Democratic Angelica Earl 15,500 2.55%
Democratic Travis Gonzalez 9,480 1.56%
Democratic Leonard Steinman 7,657 1.26%
Total votes 607,577 100.00%
Close

Republican primary

Candidates

Nominated

Eliminated in primary

Withdrew

Declined

Endorsements

Josh Hawley
U.S. executive branch officials
U.S. senators
U.S. representatives
State officials

Cabinet-level officials

Organizations
Austin Petersen
Individuals
Organizations
Courtland Sykes
State judges

Debates

More information Host network, Date ...
Host
network
Date Link(s) Participants
Josh
Hawley
Austin
Petersen
Courtland
Sykes
Tony
Monetti
Peter
Pfeifer
Kirsti
Nichols
America First Missouri May 11, 2018 [52] Absent Present Present Present Present Present
Close

Polling

More information Poll source, Date(s) administered ...
Poll source Date(s)
administered
Sample
size
Margin
of error
Josh
Hawley
Austin
Petersen
Courtland
Sykes
Other Undecided
Emerson College[53] April 26–29, 2018 283 ± 6.0% 37% 8% 6% 5% 45%
Close
Hypothetical polling
More information Poll source, Date(s) administered ...
Poll source Date(s)
administered
Sample
size
Margin
of error
Josh
Hawley
David
Steelman
Ann
Wagner
David
Wasinger
Undecided
Remington Research Group[54] April 28–29, 2017 915 ± 3.1% 30% 7% 14% 2% 47%
37% 16% 47%
Close

Results

Results by county:
  Hawley
  •   60–70%
  •   50–60%
  •   40–50%
  Monetti
  •   40–50%
More information Party, Candidate ...
Republican primary results[16]
Party Candidate Votes %
Republican Josh Hawley 389,878 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 2.95%
Republican Peter Pfeifer 16,594 2.50%
Republican Courtland Sykes 13,870 2.09%
Republican Fred Ryman 8,781 1.32%
Republican Brian Hagg 6,871 1.03%
Republican Bradley Krembs 4,902 0.74%
Total votes 664,889 100.00%
Close

Libertarian primary

Candidates

Nominated

  • Japheth Campbell, entrepreneur[55]

Withdrew

Declined

Results

Results by county:
Campbell
  •   100%
No votes
  •   No votes
More information Party, Candidate ...
Libertarian primary results[16]
Party Candidate Votes %
Libertarian Japheth Campbell 5,380 100.00%
Total votes 5,380 100.00%
Close

Green primary

Candidates

Nominated

  • Jo Crain

Eliminated in primary

  • Jerome Bauer

Results

Results by county:
  Crain
  •   100%
  •   80–90%
  •   70–80%
  •   60–70%
  •   50–60%
  Crain/Bauer tie
  •   50%
  Bauer
  •   50–60%
  •   60–70%
  •   70–80%
  •   80–90%
  •   100%
No votes
  •   No votes
More information Party, Candidate ...
Green primary results[16]
Party Candidate Votes %
Green Jo Crain 906 57.67%
Green Jerome Bauer 665 42.33%
Total votes 1,571 100.00%
Close

Independents

Candidates

Declared

  • Craig O'Dear, attorney[59]

General election

Predictions

More information Source, Ranking ...
Source Ranking As of
The Cook Political Report[60] Tossup October 26, 2018
Inside Elections[61] Tilt R (flip) November 1, 2018
Sabato's Crystal Ball[62] Lean R (flip) November 5, 2018
CNN[63] Tossup November 5, 2018
RealClearPolitics[64] Tossup November 5, 2018
Daily Kos[65] Tossup November 5, 2018
Fox News[66] Tossup November 5, 2018
FiveThirtyEight[67] Tossup November 5, 2018
Close

Debates

Fundraising

More information Campaign finance reports as of October 17, 2018, Candidate ...
Campaign finance reports as of October 17, 2018
Candidate Total receipts Total disbursements Cash on hand
Claire McCaskill (D) $35,361,401 $33,594,412 $1,789,381
Josh Hawley (R) $10,221,143 $7,376,209 $2,844,933
Source: Federal Election Commission[68]
Close

Polling

More information Poll source, Date(s) administered ...
Poll source Date(s)
administered
Sample
size
Margin
of error
Claire
McCaskill
(D)
Josh
Hawley
(R)
Japheth
Campbell
(L)
Craig
O'Dear
(I)
Jo
Crain
(G)
Other Undecided
HarrisX[69] November 3–5, 2018 600 ± 4.0% 45% 46%
HarrisX[70] November 2–4, 2018 600 ± 4.0% 44% 47%
Trafalgar Group (R)[71] October 29 – November 4, 2018 1,791 ± 2.3% 44% 48% 4% 3%
Emerson College[72] November 1–3, 2018 732 ± 3.8% 46% 49% 3% 3%
HarrisX[73] November 1–3, 2018 600 ± 4.0% 46% 46%
Missouri Scout/Remington (R)[74] November 1–2, 2018 1,424 ± 2.6% 47% 47% 1% 1% 1% 3%
HarrisX[75] October 31 – November 2, 2018 600 ± 4.0% 45% 46%
NBC News/Marist[76] October 30 – November 1, 2018 600 LV ± 5.2% 47% 44% 3% 2% <1% 4%
50% 47% <1% 3%
920 RV ± 4.1% 46% 43% 3% 2% 1% 6%
50% 46% 1% 4%
HarrisX[77] October 30 – November 1, 2018 600 ± 4.0% 46% 43%
HarrisX[78] October 29–31, 2018 600 ± 4.0% 45% 43%
HarrisX[79] October 24–30, 2018 1,400 ± 2.6% 46% 44%
Fox News[80] October 27–30, 2018 741 LV ± 3.5% 43% 43% 0% 3% 1% 0% 9%
45% 45% 2% 8%
851 RV ± 3.0% 41% 42% 1% 3% 2% 1% 10%
43% 44% 3% 9%
Cygnal (R)[81] October 26–27, 2018 501 ± 4.4% 46% 49% 1% 3%
Missouri Scout/Remington (R)[82] October 24–25, 2018 1,376 ± 2.6% 45% 49% 1% 1% 1% 3%
Missouri Scout/Remington (R)[83] October 17–18, 2018 1,215 ± 2.7% 46% 47% 2% 1% 1% 2%
OnMessage Inc. (R-Hawley)[84] October 16–18, 2018 800 ± 3.5% 42% 49% 4% 5%
The Polling Company (R-Citizens United)[85] October 11–13, 2018 600 ± 4.0% 47% 50% 0% 3%
Ipsos[86] September 27 – October 7, 2018 1,111 ± 3.0% 44% 45% 1% 2% 0% 2% 6%
1st Tuesday Campaigns[87] October 5–6, 2018 1,052 ± 3.0% 42% 44% 1% 1% 1% 11%
Fox News[88] September 29 – October 2, 2018 683 LV ± 3.5% 43% 43% 2% 4% 1% 1% 6%
46% 46% 3% 5%
805 RV ± 3.5% 41% 41% 2% 4% 2% 1% 9%
44% 44% 3% 8%
McLaughlin (R-Missouri Rising Action)[89] September 29 – October 2, 2018 600 ± 4.0% 44% 52%
Vox Populi Polling[90] September 29 – October 1, 2018 869 ± 3.3% 49% 51%
CNN/SSRS[91] September 25–29, 2018 756 LV ± 4.3% 47% 44% 3% 1% 0% 4%
906 RV ± 3.9% 43% 42% 4% 2% 0% 6%
Missouri Scout/Remington (R)[92] September 26–27, 2018 1,555 ± 2.5% 46% 48% 6%
YouGov[93] September 10–14, 2018 917 45% 45% 4% 6%
Trafalgar Group (R)[94] September 11–13, 2018 1,724 ± 2.4% 44% 47% 8%
Fox News[95] September 8–11, 2018 675 LV ± 3.5% 44% 41% 1% 3% 1% 1% 8%
45% 45% 3% 7%
808 RV ± 3.5% 41% 39% 1% 4% 1% 1% 11%
42% 43% 3% 10%
NBC News/Marist[96] August 25–28, 2018 568 LV ± 4.8% 44% 40% 5% 3% <1% 8%
47% 47% 1% 5%
774 RV ± 4.2% 43% 39% 6% 3% <1% 8%
46% 47% 1% 5%
WPA Intelligence (R-Club For Growth)[97] August 12–14, 2018 501 ± 4.4% 41% 48% 3% 8%
Missouri Scout/Remington (R)[98] August 8–9, 2018 1,785 ± 2.3% 47% 47% 6%
WPA Intelligence (R-Club For Growth)[97] July 10–12, 2018 602 ± 4.0% 42% 43% 4% 11%
The Missouri Times/Remington (R)[99] July 7–8, 2018 1,034 ± 3.2% 46% 48% 6%
SurveyMonkey/Axios[100] June 11 – July 2, 2018 1,038 ± 5.0% 49% 47% 4%
McLaughlin (R-Missouri Rising Action)[89] June 2018 46% 42%
Global Strategy Group (D-SMP)[101] June 11–13, 2018 804 ± 3.5% 47% 41%
Gravis Marketing (R-Petersen)[102] May 16, 2018 822 ± 3.4% 43% 50% 7%
Missouri Scout/TJP Strategies (D)[103] May 9–10, 2018 898 ± 3.3% 48% 44% 8%
Emerson College[53] April 26–29, 2018 600 ± 4.2% 45% 45% 11%
Missouri Scout/TJP Strategies (D)[104] April 19–20, 2018 1,542 ± 2.5% 48% 44% 8%
OnMessage Inc. (R-Hawley)[105] April 16–18, 2018 600 ± 4.0% 46% 47% 7%
Global Strategy Group (D-SMP)[101] April 9–12, 2018 46% 44%
Mason-Dixon[106] April 4–6, 2018 625 ± 4.0% 45% 44% 11%
Gravis Marketing[107] March 5–7, 2018 931 ± 3.2% 42% 40% 18%
SurveyMonkey/Axios[108] February 12 – March 5, 2018 1,938 ± 3.6% 44% 52% 4%
Public Policy Polling (D-TMI)[109] January 8–9, 2018 965 ± 3.2% 45% 44% 11%
Missouri Scout/Remington (R)[110] January 3–4, 2018 1,122 ± 2.9% 45% 49% 6%
Missouri Scout/Remington (R)[111] October 11–12, 2017 965 ± 3.1% 45% 48% 7%
Missouri Scout/Remington (R)[112] August 16–18, 2017 922 ± 3.0% 45% 50% 5%
Fabrizio Lee (R)[113] July 10–11, 2017 500 ± 4.4% 42% 46% 12%
Missouri Scout/Remington (R)[114] July 7–8, 2017 928 ± 3.2% 44% 50% 6%
Close
Hypothetical polling

with Austin Petersen

More information Poll source, Date(s) administered ...
Poll source Date(s)
administered
Sample
size
Margin
of error
Claire
McCaskill (D)
Austin
Petersen (R)
Undecided
Gravis Marketing (R-Petersen)[102] May 16, 2018 822 ± 3.4% 40% 56% 4%
Close

with generic Republican

More information Poll source, Date(s) administered ...
Poll source Date(s)
administered
Sample
size
Margin
of error
Claire
McCaskill (D)
Generic
Republican
Undecided
Fabrizio Lee (R)[113] July 10–11, 2017 500 ± 4.4% 38% 54% 8%
Close

with Vicky Hartzler

More information Poll source, Date(s) administered ...
Poll source Date(s)
administered
Sample
size
Margin
of error
Claire
McCaskill (D)
Vicky
Hartzler (R)
Undecided
Missouri Scout/Remington (R)[114] July 7–8, 2017 928 ± 3.2% 44% 48% 8%
Close

with Blaine Luetkemeyer

More information Poll source, Date(s) administered ...
Poll source Date(s)
administered
Sample
size
Margin
of error
Claire
McCaskill (D)
Blaine
Luetkemeyer (R)
Undecided
Missouri Scout/Remington (R)[114] July 7–8, 2017 928 ± 3.2% 43% 50% 7%
Close

with Todd Richardson

More information Poll source, Date(s) administered ...
Poll source Date(s)
administered
Sample
size
Margin
of error
Claire
McCaskill (D)
Todd
Richardson (R)
Undecided
Missouri Scout/Remington (R)[114] July 7–8, 2017 928 ± 3.2% 43% 48% 9%
Close

with Eric Schmitt

More information Poll source, Date(s) administered ...
Poll source Date(s)
administered
Sample
size
Margin
of error
Claire
McCaskill (D)
Eric
Schmitt (R)
Undecided
Missouri Scout/Remington (R)[114] July 7–8, 2017 928 ± 3.2% 45% 49% 6%
Close

with Jason Smith

More information Poll source, Date(s) administered ...
Poll source Date(s)
administered
Sample
size
Margin
of error
Claire
McCaskill (D)
Jason
Smith (R)
Undecided
Missouri Scout/Remington (R)[114] June 7–8, 2017 928 ± 3.2% 45% 48% 7%
Close

Results

State Senate districts results
State House districts results

Senator McCaskill conceded a few hours after the polls closed on election day. Despite performing strongly in the St. Louis suburbs, she ran well behind her 2012 vote in Southeast Missouri, especially in the Lead Belt and the Missouri Bootheel. She also ran poorly in the northern part of the state.[115]

More information Party, Candidate ...
United States Senate election in Missouri, 2018[116]
Party Candidate Votes % ±%
Republican Josh Hawley 1,254,927 51.38% +12.27
Democratic Claire McCaskill (incumbent) 1,112,935 45.57% −9.24
Independent Craig O'Dear 34,398 1.41% N/A
Libertarian Japheth Campbell 27,316 1.12% −4.95
Green Jo Crain 12,706 0.52% N/A
Write-in 7 0.00% N/A
Total votes 2,442,289 100.00% N/A
Republican gain from Democratic
Close

Counties that flipped from Democratic to Republican

By congressional district

Hawley won five of eight congressional districts, with the remaining three going to McCaskill, including one that elected a Republican.[117]

More information District, McCaskill ...
District McCaskill Hawley Representative
1st 82% 16% Lacy Clay
2nd 50% 48% Ann Wagner
3rd 38% 59% Blaine Luetkemeyer
4th 36% 60% Vicky Hartzler
5th 61% 36% Emanuel Cleaver
6th 39% 58% Sam Graves
7th 31% 65% Billy Long
8th 28% 69% Jason Smith
Close

Voter demographics

More information Demographic subgroup, McCaskill ...
Edison Research exit poll
Demographic subgroup McCaskill Hawley % of
voters
Gender
Men 42 57 49
Women 51 47 51
Age
18–24 years old 55 42 6
25–29 years old 57 42 7
30–39 years old 52 45 15
40–49 years old 44 54 16
50–64 years old 43 56 31
65 and older 45 54 25
Race
White 42 57 84
Black 91 8 8
Latino 53 44 4
Race by gender
White men 37 62 41
White women 46 52 43
Black men 91 7 4
Black women 90 9 5
Education
High school or less 34 64 22
Some college education 48 51 27
Associate degree 46 53 14
Bachelor's degree 51 48 22
Advanced degree 58 41 15
Party ID
Democrats 93 6 31
Republicans 7 92 37
Independents 46 51 32
Ideology
Liberals 90 9 23
Moderates 60 37 38
Conservatives 8 91 39
Marital status
Married 43 55 63
Unmarried 57 41 37
Gender by marital status
Married men 39 61 34
Married women 49 49 28
Unmarried men 47 50 11
Unmarried women 64 33 21
First-time midterm election voter
Yes 59 38 13
No 44 56 87
Most important issue facing the country
Immigration 13 86 20
Healthcare 71 27 47
Gun policy 52 47 8
Economy 33 65 23
Area type
Urban 67 32 35
Suburban 42 57 37
Rural 27 71 28
Source: CNN[118]
Close

References

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