The 2018 United States Senate election in Washington took place on November 6, 2018, to elect a member of the United States Senate to represent the State of Washington. Incumbent Democrat Maria Cantwell won election to a fourth term over television news journalist Susan Hutchison, a Republican.

Nonpartisan blanket primary Candidates The primary election featured 30 candidates.

Democratic Party Declared Maria Cantwell, incumbent senatorCANTWELL, MARIA George H. Kalberer Don L. RiversRIVERS, DON L MR Mohammad Said Clint TannehillTANNEHILL, CLINT RONALD

Republican Party Declared Dave Bryant Art Coday Rocky De La Fuente, businessman and former presidential candidate Joey Gibson, activist and founder of Patriot Prayer Goodspaceguy, perennial candidate Matt Hawkins Matthew D. Heines Susan Hutchison, former chair of the Washington State Republican Party John Orlinski Tim Owen RC Smith Glen Stockwell Keith Swank

Withdrawn Ron Higgins (withdrew May 19, 2018)

Endorsements

Independents Declared Thor Amundson Jon Butler Jennifer "GiGi" FergusonDetails for Candidate ID : S8WA00202 Charlie R. Jackson Dave StriderSTRIDER, DAVID LEE

Write-in Clay Johnson, activist

Minor parties In Washington, primary candidates may declare a preference for any party, and their party preference does not imply that the candidate is nominated or endorsed by the party. Candidates may also declare a preference for new or single-candidate parties.

Declared Brad Chase (FDFR Party), communications strategist James Robert "Jimmie" Deal (Green Party) Steve Hoffman (Freedom Socialist Party), union organizer Mike Luke (Libertarian Party) Alex Tsimerman (StandupAmerica)TSIMERMAN, ALEX Sam Wright (The Human Rights Party)

Notes

Results

General election Debates + 2018 United States Senate election in Washington debates Date Host Moderator Link Democratic RepublicanKey: Participant  Absent  Not invited  Invited Withdrawn Maria Cantwell Susan Hutchison1 Oct. 8, 2018 KOMO-TVPacific Lutheran University Mary NamEssex PorterC-SPAN 2 Oct. 20, 2018 Community Colleges of SpokaneGonzaga UniversityEastern Washington UniversityUniversity of WashingtonWashington State University SpokaneWhitworth University Hayley GuenthnerJane McCarthyC-SPAN

Predictions SourceRankingAs ofThe Cook Political Report October 26, 2018Inside Elections November 1, 2018Sabato's Crystal Ball November 5, 2018Fox News July 9, 2018CNN July 12, 2018RealClearPolitics November 5, 2018

Post-primary endorsements

Polling

Poll source Date(s)administered Samplesize Marginof error MariaCantwell (D) SusanHutchison (R) UndecidedElway/CrosscutElway/CrosscutOctober 4–9, 2018405 (RV)± 5.0%53%39%9%Public Policy Polling (D)Public Policy Polling (D)May 22–23, 2018675 (LV)± 3.8%52%36%12%

Maria Cantwell vs. Rob McKenna Poll source Date(s)administered Samplesize Marginof error MariaCantwell (D) RobMcKenna (R) UndecidedPublic Policy Polling (D)Public Policy Polling (D)June 27–28, 2017887 (LV)± 3.3%53%40%6%

Results

By county

CountyMaria Cantwell DemocraticSusan Hutchison RepublicanMarginTotal%#%#%#Adams32.25%1,36567.75%2,867–35.49%–1,5024,232Asotin41.82%3,80958.18%5,298–16.35%–1,4899,107Benton37.52%28,18762.48%46,938–24.96%–18,75175,125Chelan44.06%14,78755.94%18,775–11.88%–3,98833,562Clallam50.67%20,03649.33%19,5041.35%53239,540Clark52.96%102,61947.04%91,1535.92%11,466193,772Columbia33.24%73166.76%1,468–33.52%–7372,199Cowlitz46.29%20,48553.71%23,773–7.43%–3,28844,258Douglas36.17%5,39063.83%9,512–27.66%–4,12214,902Ferry38.10%1,32961.90%2,159–23.80%–8303,488Franklin40.26%8,98359.74%13,329–19.48%–4,34622,312Garfield33.58%44566.42%880–32.83%–4351,325Grant30.80%8,15969.20%18,333–38.40%–10,17426,492Grays Harbor47.81%13,60552.19%14,851–4.38%–1,24628,456Island53.18%22,34146.82%19,6726.35%2,66942,013Jefferson68.79%14,33131.21%6,50237.58%7,82920,833King74.15%708,65425.85%247,07148.30%461,583955,725Kitsap56.47%67,84743.53%52,30812.93%15,539120,155Kittitas43.10%8,33056.90%10,996–13.79%–2,66619,326Klickitat45.84%4,88954.16%5,776–8.32%–88710,665Lewis32.71%11,07867.29%22,793–34.59%–11,71533,871Lincoln28.76%1,60471.24%3,974–42.49%–2,3705,578Mason47.84%13,22052.16%14,416–4.33%–1,19627,636Okanogan43.44%7,23156.56%9,414–13.12%–2,18316,645Pacific50.90%5,52749.10%5,3321.80%19510,859Pend Oreille36.13%2,47763.87%4,379–27.74%–1,9026,856Pierce53.36%174,09746.64%152,1776.72%21,920326,274San Juan72.60%8,01627.40%3,02645.19%4,99011,042Skagit51.49%28,12248.51%26,4982.97%1,62454,620Skamania47.71%2,66352.29%2,919–4.59%–2565,582Snohomish57.39%184,21842.61%136,74914.79%47,469320,967Spokane49.23%112,00050.77%115,508–1.54%–3,508227,508Stevens32.23%7,27467.77%15,296–35.54%–8,02222,570Thurston58.54%72,67741.46%51,47217.08%21,205124,149Wahkiakum44.66%1,08255.34%1,341–10.69%–2592,423Walla Walla46.35%11,86253.65%13,731–7.30%–1,86925,593Whatcom59.77%65,04340.23%43,78119.54%21,262108,824Whitman54.35%9,37545.65%7,8758.70%1,50017,250Yakima41.85%29,47658.15%40,958–16.30%–11,48270,434Total58.43%1,803,36441.57%1,282,80416.87%520,5603,086,168

Counties that flipped from Democratic to Republican Cowlitz (largest city: Longview) Grays Harbor (largest city: Aberdeen) Klickitat (largest city: Goldendale) Mason (largest city: Shelton) Skamania (largest city: Carson) Yakima (largest city: Yakima) Wahkiakum (largest city: Puget Island)

Counties that flipped from Republican to Democratic Whitman (largest city: Pullman)

By congressional district Cantwell won seven of ten congressional districts. District Cantwell Hutchison Representative 57% 43%Suzan DelBene 61% 39%Rick Larsen 49% 51%Jaime Herrera Beutler 38% 62%Dan Newhouse 47% 53%Cathy McMorris Rodgers 57% 43%Derek Kilmer 84% 16%Pramila Jayapal 51% 49%Kim Schrier 73% 27%Adam Smith 56% 44%Denny Heck

Notes

Partisan clients

References

External links Candidates at Vote Smart Candidates at Ballotpedia Campaign finance at FEC Campaign finance at OpenSecrets

Official campaign websites Maria Cantwell (D) for Senate Susan Hutchison (R) for Senate