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.
Democratic primary Candidates Nominated Elizabeth Warren, incumbent U.S. senator
Results
Republican primary Candidates Nominated Geoff Diehl, state representative
Eliminated in primary 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
Eliminated at convention Darius Mitchell Heidi Wellman
Declined 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
Endorsements
Polling Poll source Date(s)administered Samplesize Marginof error GeoffDiehl JohnKingston BethLindstrom Other UndecidedMassINCMassINC June 22–25, 2018 399 ± 4.9% 26% 12% 15% 5% 41%
Results Overall
By county
Results by county. Red represents counties won by Diehl. Teal represents counties won by Kingston.
County Diehl% Diehlvotes Kingston% Kingstonvotes Lindstrom% Lindstromvotes Barnstable 57.0% 10,761 24.2% 4,573 18.6% 3,513 Berkshire 47.9% 1,221 37.8% 965 13.8% 352 Bristol 61.8% 11,005 23.0% 4,095 15.0% 2,669 Dukes 55.2% 347 25.9% 163 18.9% 119 Essex 53.1% 17,716 28.3% 9,428 18.3% 6,104 Franklin 41.8% 938 42.3% 949 15.3% 343 Hampden 50.5% 7,491 34.0% 5,048 15.0% 2,225 Hampshire 45.7% 1,967 36.7% 1,579 16.9% 725 Middlesex 52.5% 29,084 26.8% 14,852 20.3% 11,218 Nantucket 50.1% 168 29.6% 99 20.3% 68 Norfolk 58.9% 18,749 22.0% 7,009 18.8% 5,992 Plymouth 70.1% 23,242 19.8% 6,549 10.0% 3,316 Suffolk 53.5% 4,792 27.6% 2,471 18.2% 1,628 Worcester 44.8% 16,562 32.1% 11,856 22.8% 8,421 Total 55.2% 144,043 26.7% 69,636 17.9% 46,693
Libertarian primary Candidates Declined Bill Weld, former Republican governor and nominee for vice president of the United States in 2016
Independents Candidates Declared Shiva Ayyadurai, entrepreneur and conspiracy theorist John Devine Allen Waters
Declined Gabriel Gomez, businessman, former Navy SEAL and Republican nominee for the U.S. Senate in 2013
General election Endorsements
Debates Complete video of debate, October 19, 2018 Complete video of debate, October 21, 2018
Predictions SourceRankingAs ofThe Cook Political Report September 28, 2018Inside Elections September 29, 2017Sabato's Crystal Ball September 27, 2017Fox News July 9, 2018CNN July 12, 2018RealClearPolitics May 26, 2018 ^Highest rating they assert
Polling Poll source Date(s)administered Samplesize Marginof error ElizabethWarren (D) GeoffDiehl (R) ShivaAyyadurai (I) Other UndecidedMassINCMassINC October 25–28, 2018 502 ± 4.4% 54% 32% 6% 3% 3%Suffolk UniversitySuffolk University October 24–28, 2018 500 ± 4.4% 56% 34% 4% – 5%Western New England UniversityWestern New England University October 10–27, 2018 402 LV ± 5.0% 57% 27% 7% – 8% 485 RV ± 4.0% 54% 27% 6% – 12%UMass LowellUMass Lowell October 1–7, 2018 485 LV ± 5.6% 56% 31% 8% 3% 2% 791 RV ± 4.4% 56% 28% 9% 4% 1%MassINCMassINC September 17–21, 2018 506 ± 4.4% 56% 30% 5% 1% 6%Suffolk UniversitySuffolk University September 13–17, 2018 500 ± 4.4% 54% 24% 6% – 16%Suffolk UniversitySuffolk University June 8–12, 2018 500 ± 4.4% 55% 33% – – 11%MassINCMassINC May 22–26, 2018 501 ± 4.4% 54% 19% 8% 1% 15%MassINCMassINC March 16–18, 2018 504 ± 4.4% 55% 20% 9% 1% 13%MassINCMassINC November 9–12, 2017 503 ± 4.4% 58% 32% – 3% 7%MassINCMassINC June 19–22, 2017 504 ± 4.4% 60% 29% – 1% 8%
with Beth Lindstrom Poll source Date(s)administered Samplesize Marginof error ElizabethWarren (D) BethLindstrom (R) ShivaAyyadurai (I) Other UndecidedSuffolk University June 8–12, 2018 500 ± 4.4% 56% 31% – – 13%MassINC May 22–26, 2018 501 ± 4.4% 55% 19% 7% 2% 15%MassINC March 16–18, 2018 504 ± 4.4% 53% 19% 9% 1% 14%MassINC November 9–12, 2017 504 ± 4.4% 56% 33% – 3% 8%
with John Kingston Poll source Date(s)administered Samplesize Marginof error ElizabethWarren (D) JohnKingston (R) ShivaAyyadurai (I) Other UndecidedSuffolk University June 8–12, 2018 500 ± 4.4% 54% 30% – – 15%MassINC May 22–26, 2018 501 ± 4.4% 56% 19% 8% 1% 14%MassINC March 16–18, 2018 504 ± 4.4% 53% 19% 7% 2% 12%MassINC November 9–12, 2017 504 ± 4.4% 57% 33% – 2% 7%
Poll source Date(s)administered Samplesize Marginof error ElizabethWarren (D) KarynPolito (R) MittRomney (R) RichardTisei (R) Other UndecidedUMass AmherstUMass Amherst 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 source Date(s)administered Samplesize Marginof error ElizabethWarren (D) ShivaAyyadurai (R) Other UndecidedMassINC November 9–12, 2017 504 ± 4.4% 58% 27% 4% 10%MassINC June 19–22, 2017 504 ± 4.4% 61% 25% 2% 9%
with Curt Schilling Poll source Date(s)administered Samplesize Marginof error ElizabethWarren (D) CurtSchilling (R) Other UndecidedSuffolk UniversitySuffolk University October 24–26, 2016 500 ± 4.4% 58% 24% 2% 16%UMass Amherst September 15–20, 2016 ≈450 ± 4.1% 47% 28% 9% 16%MassINCMassINC September 7–10, 2016 506 ± 4.4% 54% 29% 3% 15%
with William Weld Poll source Date(s)administered Samplesize Marginof error ElizabethWarren (D) WilliamWeld (L) Other UndecidedUMass Amherst September 15–20, 2016 ≈450 ± 4.1% 40% 37% 8% 16%
Results
By county
CountyElizabeth WarrenDemocraticGeoff DiehlRepublicanAll others#%#%#%Barnstable62,67053.151,81043.93,6283.1Berkshire38,79272.113,50125.11,5432.9Bristol98,92152.283,91944.36,6733.5Dukes7,41473.22,33823.13813.8Essex178,34357.3121,06738.911,7673.8Franklin22,91269.58,79026.71,2653.8Hampden86,86155.763,15240.55,8863.8Hampshire49,94370.618,21725.82,5713.6Middlesex440,90166.2202,87130.422,6423.4Nantucket2,23361.71,38638.31653.1Norfolk179,85358.6117,20238.29,6243.1Plymouth107,59548.0109,99549.16,4902.9Suffolk196,62378.846,50218.66,3252.5Worcester159,88151.4138,49544.512,7724.1 Totals1,634,21360.4979,50736.291,7323.4
Counties that flipped from Republican to Democratic Barnstable (largest municipality: Barnstable) Essex (largest municipality: Lynn) Norfolk (largest municipality: Quincy) Worcester (largest municipality: Worcester)
By congressional district Warren won all of the state’s congressional districts. District Warren Diehl Representative1st59%37%Richard Neal2nd57%39%Jim McGovern3rd57%39%Niki Tsongas (115th Congress)Lori Trahan (116th Congress)4th58%38%Joe Kennedy III5th69%28%Katherine Clark6th 55% 41%Seth Moulton7th84%13%Michael Capuano (115th Congress)Ayanna Pressley (116th Congress)8th58%39%Stephen Lynch9th51%46%Bill Keating
References
External links 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