2018 United States Senate election in Massachusetts

Last updated

2018 United States Senate election in Massachusetts
Flag of Massachusetts.svg
  2012 November 6, 2018 (2018-11-06) 2024  
Turnout59.17%
  Elizabeth Warren--2016 Official Portrait--(cropped).jpg Geoff Diehl crop.jpg
Nominee Elizabeth Warren Geoff Diehl
Party Democratic Republican
Popular vote1,633,371979,210
Percentage60.34%36.17%

2018 MA US Senate.svg
2018 United States Senate Election in Massachusetts by Municipality.svg
MA-2018-sen-districts.svg
MA Senate 2018 Precinct Results.svg
Warren:     40–50%     50–60%     60–70%     70–80%     80–90%     >90%
Diehl:     40–50%     50–60%     60–70%
Tie:      40–50%

U.S. senator before election

Elizabeth Warren
Democratic

Elected U.S. Senator

Elizabeth Warren
Democratic

The 2018 United States Senate election in Massachusetts took place on November 6, 2018. Incumbent Democratic U.S. senator Elizabeth Warren ran for re-election to a second term. The candidate filing deadline was June 5, 2018, and the primary election was held on September 4, 2018. [1]

Contents

Warren won re-election, defeating her Republican opponent, Geoff Diehl. [2]

Democratic primary

Candidates

Nominated

Results

United States Senate Democratic primary in Massachusetts results by county, 2018:
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Warren-->=90% 2018 MA US Senate Dem primary.svg
United States Senate Democratic primary in Massachusetts results by county, 2018:
  Warren—≥90%
Democratic primary results [5]
PartyCandidateVotes%
Democratic Elizabeth Warren (incumbent) 590,835 98.08%
Write-in 11,5581.92%
Total votes602,393 100.00%

Republican primary

Candidates

Nominated

Eliminated in primary

Eliminated at convention

  • Darius Mitchell [9]
  • Heidi Wellman [10]

Declined

Endorsements

Beth Lindstrom

Governors

State legislators

Local officials

Organizations

Newspapers

John Kingston

State legislators

Local officials

Individuals

Polling

Poll sourceDate(s)
administered
Sample
size
Margin
of error
Geoff
Diehl
John
Kingston
Beth
Lindstrom
OtherUndecided
MassINC [43] June 22–25, 2018399± 4.9%26%12%15%5%41%

Results

Overall

Massachusetts United States Senate Republican primary results by municipality, 2018 Massachusetts United States Senate Republican primary results by municipality, 2018.svg
Massachusetts United States Senate Republican primary results by municipality, 2018
Republican primary results [5]
PartyCandidateVotes%
Republican Geoff Diehl 144,043 55.15%
Republican John Kingston 69,63626.66%
Republican Beth Lindstrom46,69317.88%
Write-in 7980.31%
Total votes261,170 100.00%

By county

Massachusetts United States Senate Republican primary results by county, 2018:
Diehl--70-80%
Diehl--60-70%
Diehl--50-60%
Diehl--40-50%
Kingston--40-50% 2018 MA US Senate GOP primary.svg
Massachusetts United States Senate Republican primary results by county, 2018:
  Diehl—70–80%
  Diehl—60–70%
  Diehl—50–60%
  Diehl—40–50%
  Kingston—40–50%

Results by county. Red represents counties won by Diehl. Teal represents counties won by Kingston.

CountyDiehl
%
Diehl
votes
Kingston
%
Kingston
votes
Lindstrom
%
Lindstrom
votes
Barnstable 57.0%10,76124.2%4,57318.6%3,513
Berkshire 47.9%1,22137.8%96513.8%352
Bristol 61.8%11,00523.0%4,09515.0%2,669
Dukes 55.2%34725.9%16318.9%119
Essex 53.1%17,71628.3%9,42818.3%6,104
Franklin 41.8%93842.3%94915.3%343
Hampden 50.5%7,49134.0%5,04815.0%2,225
Hampshire 45.7%1,96736.7%1,57916.9%725
Middlesex 52.5%29,08426.8%14,85220.3%11,218
Nantucket 50.1%16829.6%9920.3%68
Norfolk 58.9%18,74922.0%7,00918.8%5,992
Plymouth 70.1%23,24219.8%6,54910.0%3,316
Suffolk 53.5%4,79227.6%2,47118.2%1,628
Worcester 44.8%16,56232.1%11,85622.8%8,421
Total55.2%144,04326.7%69,63617.9%46,693

Libertarian primary

Candidates

Declined

Independents

Candidates

Declared

Declined

General election

Endorsements

Geoff Diehl (R)

U.S. Executive Branch officials

Governors

State legislators

Local officials

Individuals

Organizations

Newspapers

Shiva Ayyadurai (I)

Individuals

Newspapers

Debates

Predictions

SourceRankingAs of
The Cook Political Report [119] Safe DSeptember 28, 2018
Inside Elections [120] Safe DSeptember 29, 2017
Sabato's Crystal Ball [121] Safe DSeptember 27, 2017
Fox News [122] Likely DJuly 9, 2018
CNN [123] Safe DJuly 12, 2018
RealClearPolitics [124] Safe DMay 26, 2018

^Highest rating they assert

Polling

Poll sourceDate(s)
administered
Sample
size
Margin
of error
Elizabeth
Warren (D)
Geoff
Diehl (R)
Shiva
Ayyadurai (I)
OtherUndecided
MassINC [125] October 25–28, 2018502± 4.4%54%32%6%3%3%
Suffolk University [126] October 24–28, 2018500± 4.4%56%34%4%5%
Western New England University [127] October 10–27, 2018402 LV± 5.0%57%27%7%8%
485 RV± 4.0%54%27%6%12%
UMass Lowell [128] October 1–7, 2018485 LV± 5.6%56%31%8%3%2%
791 RV± 4.4%56%28%9%4%1%
MassINC [129] September 17–21, 2018506± 4.4%56%30%5%1%6%
Suffolk University [130] September 13–17, 2018500± 4.4%54%24%6%16%
Suffolk University [131] June 8–12, 2018500± 4.4%55%33%11%
MassINC [132] May 22–26, 2018501± 4.4%54%19%8%1%15%
MassINC [133] March 16–18, 2018504± 4.4%55%20%9%1%13%
MassINC [134] November 9–12, 2017503± 4.4%58%32%3%7%
MassINC [135] June 19–22, 2017504± 4.4%60%29%1%8%
Hypothetical polling

with Beth Lindstrom

Poll sourceDate(s)
administered
Sample
size
Margin
of error
Elizabeth
Warren (D)
Beth
Lindstrom (R)
Shiva
Ayyadurai (I)
OtherUndecided
Suffolk University [136] June 8–12, 2018500± 4.4%56%31%13%
MassINC [132] May 22–26, 2018501± 4.4%55%19%7%2%15%
MassINC [133] March 16–18, 2018504± 4.4%53%19%9%1%14%
MassINC [134] November 9–12, 2017504± 4.4%56%33%3%8%

with John Kingston

Poll sourceDate(s)
administered
Sample
size
Margin
of error
Elizabeth
Warren (D)
John
Kingston (R)
Shiva
Ayyadurai (I)
OtherUndecided
Suffolk University [137] June 8–12, 2018500± 4.4%54%30%15%
MassINC [132] May 22–26, 2018501± 4.4%56%19%8%1%14%
MassINC [133] March 16–18, 2018504± 4.4%53%19%7%2%12%
MassINC [134] November 9–12, 2017504± 4.4%57%33%2%7%
Poll sourceDate(s)
administered
Sample
size
Margin
of error
Elizabeth
Warren (D)
Karyn
Polito (R)
Mitt
Romney (R)
Richard
Tisei (R)
OtherUndecided
UMass Amherst [138] September 15–20, 2016≈450± 4.1%40%36%5%19%
44%31%10%15%
39%32%3%26%

with Shiva Ayyadurai running as Republican

Poll sourceDate(s)
administered
Sample
size
Margin
of error
Elizabeth
Warren (D)
Shiva
Ayyadurai (R)
OtherUndecided
MassINC [134] November 9–12, 2017504± 4.4%58%27%4%10%
MassINC [135] June 19–22, 2017504± 4.4%61%25%2%9%

with Curt Schilling

Poll sourceDate(s)
administered
Sample
size
Margin
of error
Elizabeth
Warren (D)
Curt
Schilling (R)
OtherUndecided
Suffolk University [139] October 24–26, 2016500± 4.4%58%24%2%16%
UMass Amherst [138] September 15–20, 2016≈450± 4.1%47%28%9%16%
MassINC [140] September 7–10, 2016506± 4.4%54%29%3%15%

with William Weld

Poll sourceDate(s)
administered
Sample
size
Margin
of error
Elizabeth
Warren (D)
William
Weld (L)
OtherUndecided
UMass Amherst [138] September 15–20, 2016≈450± 4.1%40%37%8%16%

Results

United States Senate election in Massachusetts, 2018 [141]
PartyCandidateVotes%±%
Democratic Elizabeth Warren (incumbent) 1,633,371 60.34% +6.60%
Republican Geoff Diehl 979,21036.17%−10.02%
Independent Shiva Ayyadurai 91,7103.39%N/A
Write-in 2,7990.10%N/A
Total votes2,707,090 100.00% N/A
Democratic hold

Counties that flipped from Republican to Democratic

By congressional district

Warren won all of the state’s congressional districts. [142]

DistrictDiehlWarrenRepresentative
1st 37.34%58.95% Richard Neal
2nd 39.07%57.01% Jim McGovern
3rd 38.56%57.51% Niki Tsongas (115th Congress)
Lori Trahan (116th Congress)
4th 38.45%58.19% Joe Kennedy III
5th 27.82%68.91% Katherine Clark
6th 41.21%54.98% Seth Moulton
7th 13.15%84.51% Michael Capuano (115th Congress)
Ayanna Pressley (116th Congress)
8th 39.45%57.65% Stephen Lynch
9th 45.67%51.13% Bill Keating

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