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2018 United States Senate election in Massachusetts

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.


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.

Warren won re-election, defeating her Republican opponent, state Representative Geoff Diehl.

  • Elizabeth Warren, incumbent U.S. senator

United States Senate Democratic primary in Massachusetts results by county, 2018: .mw-parser-output .legend{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .legend-color{display:inline-block;min-width:1.25em;height:1.25em;line-height:1.25;margin:1px 0;text-align:center;border:1px solid black;background-color:transparent;color:black}.mw-parser-output .legend-text{}  Warren—≥90%

PartyCandidateVotes%
Democratic590,83598.08%
Write-in11,5581.92%
602,393100.00%
  • Geoff Diehl, state representative

  • John Kingston, attorney and founder and president of Better for America

  • Beth Lindstrom, former undersecretary of the Massachusetts Office of Consumer Affairs and Business Regulation

  • Darius Mitchell

  • Heidi Wellman

  • Gabriel Gomez, businessman, former Navy SEAL and nominee for the U.S. Senate in 2013

  • Rick Green, businessman (running for House of Representatives)

  • Curt Schilling, former Major League Baseball pitcher

  • Bill Weld, former governor, nominee for the U.S. Senate in 1996 and Libertarian nominee for Vice President of the United States in 2016 (endorsed Beth Lindstrom)

  • Daniel Winslow, former state representative and candidate for the U.S. Senate in 2013

Poll sourceDate(s)administeredSamplesizeMarginof errorGeoffDiehlJohnKingstonBethLindstromOtherUndecided
MassINCJune 22–25, 2018399± 4.9%26%12%15%5%41%

Massachusetts United States Senate Republican primary results by municipality, 2018

PartyCandidateVotes%
Republican144,04355.15%
Republican69,63626.66%
Republican46,69317.88%
Write-in7980.31%
261,170100.00%

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%DiehlvotesKingston%KingstonvotesLindstrom%Lindstromvotes
Barnstable57.0%10,76124.2%4,57318.6%3,513
Berkshire47.9%1,22137.8%96513.8%352
Bristol61.8%11,00523.0%4,09515.0%2,669
Dukes55.2%34725.9%16318.9%119
Essex53.1%17,71628.3%9,42818.3%6,104
Franklin41.8%93842.3%94915.3%343
Hampden50.5%7,49134.0%5,04815.0%2,225
Hampshire45.7%1,96736.7%1,57916.9%725
Middlesex52.5%29,08426.8%14,85220.3%11,218
Nantucket50.1%16829.6%9920.3%68
Norfolk58.9%18,74922.0%7,00918.8%5,992
Plymouth70.1%23,24219.8%6,54910.0%3,316
Suffolk53.5%4,79227.6%2,47118.2%1,628
Worcester44.8%16,56232.1%11,85622.8%8,421
  • Bill Weld, former Republican governor and nominee for vice president of the United States in 2016

  • Shiva Ayyadurai, entrepreneur and conspiracy theorist

  • John Devine

  • Allen Waters

  • Gabriel Gomez, businessman, former Navy SEAL and Republican nominee for the U.S. Senate in 2013

  • Complete video of debate, October 19, 2018

  • Complete video of debate, October 21, 2018

SourceRankingAs of
The Cook Political ReportSafe DSeptember 28, 2018
Inside ElectionsSafe DSeptember 29, 2017
Sabato's Crystal BallSafe DSeptember 27, 2017
Fox NewsLikely DJuly 9, 2018
CNNSafe DJuly 12, 2018
RealClearPoliticsSafe DMay 26, 2018

^Highest rating they assert

Poll sourceDate(s)administeredSamplesizeMarginof errorElizabethWarren (D)GeoffDiehl (R)ShivaAyyadurai (I)OtherUndecided
MassINCOctober 25–28, 2018502± 4.4%54%32%6%3%3%
Suffolk UniversityOctober 24–28, 2018500± 4.4%56%34%4%5%
Western New England UniversityOctober 10–27, 2018402 LV± 5.0%57%27%7%8%
485 RV± 4.0%54%27%6%12%
UMass LowellOctober 1–7, 2018485 LV± 5.6%56%31%8%3%2%
791 RV± 4.4%56%28%9%4%1%
MassINCSeptember 17–21, 2018506± 4.4%56%30%5%1%6%
Suffolk UniversitySeptember 13–17, 2018500± 4.4%54%24%6%16%
Suffolk UniversityJune 8–12, 2018500± 4.4%55%33%11%
MassINCMay 22–26, 2018501± 4.4%54%19%8%1%15%
MassINCMarch 16–18, 2018504± 4.4%55%20%9%1%13%
MassINCNovember 9–12, 2017503± 4.4%58%32%3%7%
MassINCJune 19–22, 2017504± 4.4%60%29%1%8%
PartyCandidateVotes%.mw-parser-output .tooltip-dotted{border-bottom:1px dotted;cursor:help}±%
Democratic1,633,37160.34%+6.60%
Republican979,21036.17%−10.02%
Independent91,7103.39%N/A
Write-in2,7990.10%N/A
2,707,090100.00%N/A

Warren won all of the state’s congressional districts.

DistrictWarrenDiehlRepresentative
59%37%Richard Neal
57%39%Jim McGovern
57%39%Niki Tsongas (115th Congress)
Lori Trahan (116th Congress)
58%38%Joe Kennedy III
69%28%Katherine Clark
55%41%Seth Moulton
84%13%Michael Capuano (115th Congress)
Ayanna Pressley (116th Congress)
58%39%Stephen Lynch
51%46%Bill Keating
  • Candidates at Vote Smart
  • Candidates at Ballotpedia
  • Campaign finance at FEC
  • Campaign finance at OpenSecrets

Official campaign websites

  • Shiva Ayyadurai (I) for Senate
  • Geoff Diehl (R) for Senate
  • Elizabeth Warren (D) for Senate
  • Allen Waters (I) for Senate
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