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2026 United States Senate election in Maine

Updated: Wikipedia source

2026 United States Senate election in Maine

The 2026 United States Senate election in Maine will be held on November 3, 2026, to elect a member of the United States Senate to represent the state of Maine. Incumbent Republican Senator Susan Collins has stated that she intends to run for re-election for a sixth term, though she has not formally launched a campaign. This will be the only Republican-held Senate seat up for election in 2026 in a state that Kamala Harris won in the 2024 presidential election. Collins is the only incumbent Republican senator in any of the 19 states that Donald Trump did not win in any of his three elections. This election will coincide with U.S. House elections for Maine's two congressional districts, a gubernatorial election, and various other state, county and local elections. The primary is scheduled to take place on June 9, 2026. Both the primary and general elections will be conducted with ranked-choice voting.

Infobox

Party
Republican

Tables

· Republican primary › Fundraising
Candidate
Candidate
Campaign finance reports as of September 30, 2025
Candidate
Campaign finance reports as of September 30, 2025
Raised
Campaign finance reports as of September 30, 2025
Spent
Campaign finance reports as of September 30, 2025
Cash on hand
Susan Collins (R)
Susan Collins (R)
Campaign finance reports as of September 30, 2025
Susan Collins (R)
Campaign finance reports as of September 30, 2025
$7,933,772
Campaign finance reports as of September 30, 2025
$2,526,858
Campaign finance reports as of September 30, 2025
$6,702,107
Source: Federal Election Commission
Source: Federal Election Commission
Campaign finance reports as of September 30, 2025
Source: Federal Election Commission
Campaign finance reports as of September 30, 2025
Candidate
Raised
Spent
Cash on hand
Susan Collins (R)
$7,933,772
$2,526,858
$6,702,107
Source: Federal Election Commission
· Republican primary › Polling
University of New Hampshire
University of New Hampshire
Poll source
University of New Hampshire
Date(s)administered
October 16–21, 2025
Samplesize
417 (LV)
Marginof error
± 4.8%
CarmenCalabrese
1%
SusanCollins
66%
DanSmeriglio
1%
Other
4%
Undecided
27%
Poll source
Date(s)administered
Samplesize
Marginof error
CarmenCalabrese
SusanCollins
DanSmeriglio
Other
Undecided
University of New Hampshire
October 16–21, 2025
417 (LV)
± 4.8%
1%
66%
1%
4%
27%
· Democratic primary › Polling
SoCal Strategies
SoCal Strategies
Poll source
SoCal Strategies
Date(s)administered
October 21–25, 2025
Samplesize
500 (LV)
Marginof error
± 4.4%
DavidCostello
1%
JanetMills
41%
GrahamPlatner
36%
JordanWood
2%
Other
–
Undecided
20%
National Republican Senatorial Committee (R)
National Republican Senatorial Committee (R)
Poll source
National Republican Senatorial Committee (R)
Date(s)administered
October 22–23, 2025
Samplesize
647 (LV)
Marginof error
± 3.5%
DavidCostello
–
JanetMills
25%
GrahamPlatner
46%
JordanWood
3%
Other
–
Undecided
26%
University of New Hampshire
University of New Hampshire
Poll source
University of New Hampshire
Date(s)administered
October 16–21, 2025
Samplesize
510 (LV)
Marginof error
± 4.3%
DavidCostello
1%
JanetMills
24%
GrahamPlatner
58%
JordanWood
1%
Other
1%
Undecided
14%
Poll source
Date(s)administered
Samplesize
Marginof error
DavidCostello
JanetMills
GrahamPlatner
JordanWood
Other
Undecided
SoCal Strategies
October 21–25, 2025
500 (LV)
± 4.4%
1%
41%
36%
2%
–
20%
National Republican Senatorial Committee (R)
October 22–23, 2025
647 (LV)
± 3.5%
–
25%
46%
3%
–
26%
University of New Hampshire
October 16–21, 2025
510 (LV)
± 4.3%
1%
24%
58%
1%
1%
14%
· Democratic primary › Fundraising
Candidate
Candidate
Campaign finance reports as of September 30, 2025
Candidate
Campaign finance reports as of September 30, 2025
Raised
Campaign finance reports as of September 30, 2025
Spent
Campaign finance reports as of September 30, 2025
Cash on hand
David Costello (D)
David Costello (D)
Campaign finance reports as of September 30, 2025
David Costello (D)
Campaign finance reports as of September 30, 2025
$19,873
Campaign finance reports as of September 30, 2025
$5,121
Campaign finance reports as of September 30, 2025
$14,752
Tucker Favreau (D)
Tucker Favreau (D)
Campaign finance reports as of September 30, 2025
Tucker Favreau (D)
Campaign finance reports as of September 30, 2025
$6,128
Campaign finance reports as of September 30, 2025
$1,246
Campaign finance reports as of September 30, 2025
$4,882
Dan Kleban (D)
Dan Kleban (D)
Campaign finance reports as of September 30, 2025
Dan Kleban (D)
Campaign finance reports as of September 30, 2025
$336,745
Campaign finance reports as of September 30, 2025
$115,719
Campaign finance reports as of September 30, 2025
$221,026
Graham Platner (D)
Graham Platner (D)
Campaign finance reports as of September 30, 2025
Graham Platner (D)
Campaign finance reports as of September 30, 2025
$3,248,760
Campaign finance reports as of September 30, 2025
$1,007,837
Campaign finance reports as of September 30, 2025
$2,240,923
Daira Smith-Rodriguez (D)
Daira Smith-Rodriguez (D)
Campaign finance reports as of September 30, 2025
Daira Smith-Rodriguez (D)
Campaign finance reports as of September 30, 2025
$188,832
Campaign finance reports as of September 30, 2025
$33,305
Campaign finance reports as of September 30, 2025
$155,527
Jordan Wood (D)
Jordan Wood (D)
Campaign finance reports as of September 30, 2025
Jordan Wood (D)
Campaign finance reports as of September 30, 2025
$3,098,912
Campaign finance reports as of September 30, 2025
$2,178,443
Campaign finance reports as of September 30, 2025
$920,470
Source: Federal Election Commission
Source: Federal Election Commission
Campaign finance reports as of September 30, 2025
Source: Federal Election Commission
Campaign finance reports as of September 30, 2025
Candidate
Raised
Spent
Cash on hand
David Costello (D)
$19,873
$5,121
$14,752
Tucker Favreau (D)
$6,128
$1,246
$4,882
Dan Kleban (D)
$336,745
$115,719
$221,026
Graham Platner (D)
$3,248,760
$1,007,837
$2,240,923
Daira Smith-Rodriguez (D)
$188,832
$33,305
$155,527
Jordan Wood (D)
$3,098,912
$2,178,443
$920,470
Source: Federal Election Commission
· Independents › Fundraising
Candidate
Candidate
Campaign finance reports as of September 30, 2025
Candidate
Campaign finance reports as of September 30, 2025
Raised
Campaign finance reports as of September 30, 2025
Spent
Campaign finance reports as of September 30, 2025
Cash on hand
Phillip Rench (I)
Phillip Rench (I)
Campaign finance reports as of September 30, 2025
Phillip Rench (I)
Campaign finance reports as of September 30, 2025
$55,313
Campaign finance reports as of September 30, 2025
$31,072
Campaign finance reports as of September 30, 2025
$24,241
Source: Federal Election Commission
Source: Federal Election Commission
Campaign finance reports as of September 30, 2025
Source: Federal Election Commission
Campaign finance reports as of September 30, 2025
Candidate
Raised
Spent
Cash on hand
Phillip Rench (I)
$55,313
$31,072
$24,241
Source: Federal Election Commission
· General election › Predictions
Tilt R
Tilt R
Source
Inside Elections
Ranking
Tilt R
As of
August 12, 2025
Tossup
Tossup
Source
The Cook Political Report
Ranking
Tossup
As of
October 14, 2025
Tossup
Tossup
Source
Sabato's Crystal Ball
Ranking
Tossup
As of
October 14, 2025
Tossup
Tossup
Source
Race To The WH
Ranking
Tossup
As of
September 4, 2025
Source
Ranking
As of
Inside Elections
Tilt R
August 12, 2025
The Cook Political Report
Tossup
October 14, 2025
Sabato's Crystal Ball
Tossup
October 14, 2025
Race To The WH
Tossup
September 4, 2025
· General election › Polling
Zenith Research (D)
Zenith Research (D)
Poll source
Zenith Research (D)
Date(s)administered
October 7–10, 2025
Samplesize
501 (LV)
Marginof error
± 4.4%
SusanCollins (R)
37%
JanetMills (D)
42%
Other
10%
Undecided
12%
Poll source
Date(s)administered
Samplesize
Marginof error
SusanCollins (R)
JanetMills (D)
Other
Undecided
Zenith Research (D)
October 7–10, 2025
501 (LV)
± 4.4%
37%
42%
10%
12%
· General election › Polling
Zenith Research (D)
Zenith Research (D)
Poll source
Zenith Research (D)
Date(s)administered
October 7–10, 2025
Samplesize
501 (LV)
Marginof error
± 4.4%
SusanCollins (R)
38%
GrahamPlatner (D)
38%
Other
10%
Undecided
15%
Poll source
Date(s)administered
Samplesize
Marginof error
SusanCollins (R)
GrahamPlatner (D)
Other
Undecided
Zenith Research (D)
October 7–10, 2025
501 (LV)
± 4.4%
38%
38%
10%
15%
Public Policy Polling (D)
Public Policy Polling (D)
Poll source
Public Policy Polling (D)
Date(s)administered
September 8–9, 2025
Samplesize
642 (RV)
Marginof error
–
SusanCollins (R)
35%
DanKleban (D)
44%
Undecided
21%
Poll source
Date(s)administered
Samplesize
Marginof error
SusanCollins (R)
DanKleban (D)
Undecided
Public Policy Polling (D)
September 8–9, 2025
642 (RV)
–
35%
44%
21%

References

  1. Held office as a Democrat until becoming an independent in 2024
  2. Key:A – all adultsRV – registered votersLV – likely votersV – unclear
  3. "Write in someone else" with 4%
  4. Resigned as campaign political director and withdrew endorsement after controversy around old Reddit comments.
  5. "Write in someone else" with 1%; Evans, Favreau, and LaFlamme with 0%
  6. Withdrawn candidate
  7. "Another candidate" with 9%; "Would not vote" with 1%
  8. Poll sponsored by More Perfect Union, a progressive non-profit news media organization
  9. Poll sponsored by Kleban's campaign
  10. Maine Morning Star
    https://mainemorningstar.com/2025/06/05/eyeing-a-sixth-term-collins-facing-pressure-from-both-sides/
  11. Sabato's Crystal Ball
    https://centerforpolitics.org/crystalball/the-end-of-the-line-for-red-state-senate-democrats/
  12. Ballotpedia
    https://ballotpedia.org/Maine_elections,_2026
  13. Spectrum News
    https://spectrumlocalnews.com/me/maine/politics/2024/11/06/maine-democrats-say-they-won-enough-seats-to-control-state-senate
  14. ABC News
    https://abcnews.go.com/Politics/susan-collins-congresss-england-republican-facing-toughest-reelection/story?id=71716146
  15. Politico
    https://www.politico.com/news/2020/11/04/maine-senate-election-results-2020-434000
  16. Sabato's Crystal Ball
    https://centerforpolitics.org/crystalball/articles/the-decline-of-senate-ticket-splitting/
  17. Newsweek
    https://www.newsweek.com/susan-collins-reelection-plans-2026-senate-1986125
  18. The New York Times
    https://www.nytimes.com/2020/11/27/us/politics/susan-collins-senate-biden.html
  19. Piscataquis Observer
    https://observer-me.com/2025/04/19/news/who-will-democrats-find-to-run-against-susan-collins-in-2026/
  20. WMTW
    https://www.wmtw.com/article/maine-beer-company-founder-launches-run-for-senate/65962035
  21. WGME
    https://wgme.com/news/local/bill-clarke-announces-senate-run-to-challenge-sen-susan-collins-politics-republicans-democrats
  22. Sun Journal
    https://www.sunjournal.com/2025/02/18/a-frenchville-republican-challenges-susan-collins/
  23. Semafor
    https://www.semafor.com/article/09/18/2025/we-need-a-comforter-joe-manchin-re-enters-the-washington-arena
  24. candidates.aipacpac.org
    https://candidates.aipacpac.org/page/featured
  25. fec.gov
    https://www.fec.gov/data/elections/senate/ME/2026/
  26. University of New Hampshire
    https://scholars.unh.edu/cgi/viewcontent.cgi?article=1896&context=survey_center_polls
  27. Spectrum News
    https://spectrumlocalnews.com/me/maine/politics/2025/04/24/democrat-announces-bid-to-unseat-maine-sen--susan-collins
  28. Politico
    https://www.politico.com/news/2025/04/17/jordan-wood-challenge-susan-collins-maine-00297115
  29. Maine oyster farmer wants to upend Democratic politics with Senate bid
    https://www.politico.com/news/2025/08/19/graham-platner-maine-senate-campaign-launch-00513884
  30. The New Yorker
    https://www.newyorker.com/news/the-political-scene/can-a-maine-oyster-farmer-defeat-a-five-term-republican-senator
  31. POLITICO
    https://www.politico.com/news/2025/10/09/graham-platner-senate-democrats-00599107
  32. "Democrats still pine for Mills as Maine upstarts seek the Senate"
    http://web.archive.org/web/20250917070812/https://www.semafor.com/article/09/04/2025/democrats-still-pine-for-mills-as-maine-upstarts-seek-the-senate
  33. Axios
    https://www.axios.com/2025/09/09/schumer-bernie-sanders-2026-senate-primary-races
  34. Bangor Daily News
    https://www.bangordailynews.com/2025/09/10/politics/washington/janet-mills-is-interviewing-staff-for-a-potential-senate-run/
  35. Axios
    https://www.axios.com/2025/09/19/janet-mills-maine-senate-2026
  36. Chuck Schumer gets his preferred candidate, Janet Mills, in crowded Maine Senate race
    https://www.politico.com/news/2025/10/14/janet-mills-enters-crowded-maine-senate-race-00597876
  37. Washington Examiner
    https://www.washingtonexaminer.com/news/campaigns/congressional/3844631/bernie-sanders-publicly-discourages-janet-mills-maine-senate-campaign-2026/
  38. Portland Press Herald
    https://www.pressherald.com/2025/10/10/report-gov-janet-mills-to-launch-u-s-senate-campaign-on-tuesday/
  39. Semafor
    https://www.semafor.com/article/09/04/2025/democrats-still-pine-for-mills-as-maine-upstarts-seek-the-senate
  40. GQ
    https://www.gq.com/story/graham-platner-maine-senate
  41. CNN
    https://www.cnn.com/2025/09/07/politics/democrats-maine-senate-race-susan-collins
  42. NBC News
    https://www.nbcnews.com/politics/2026-election/maine-gov-janet-mills-launches-senate-run-democrats-top-2026-target-rcna233220
  43. Bangor Daily News
    https://www.bangordailynews.com/2025/10/14/politics/elections/dan-kleban-leaves-senate-race-endorse-janet-mills/
  44. "Today, I am formally suspending my campaign. I want to thank my team, our volunteers, and everyone who supported our fight. I look forward to continuing to fight alongside Maine activists as we work to protect our communities in these trying times"
    https://x.com/DairaForME/status/1981450170756690050
  45. NBC News
    https://www.nbcnews.com/politics/2026-election/dnc-chair-ken-martin-platner-maine-senate-reddit-disqualifying-rcna238451
  46. Vanity Fair
    https://www.vanityfair.com/news/story/graham-platner-and-his-mom-try-to-move-past-tattoo-scandal-at-a-maine-town-hall
  47. WMTW
    https://www.wmtw.com/article/graham-platner-tattoo-covered-up-nazi-totenkopf-skull/69123653
  48. Portland Press Herald
    https://www.pressherald.com/2025/06/11/brunswick-democrat-announces-campaign-for-susan-collins-senate-seat/
  49. Maine Morning Star
    https://mainemorningstar.com/2025/10/14/mills-u-s-senate-campaign-ignites-battle-between-establishment-and-grassroots-democrats/
  50. Spectrum News
    https://spectrumlocalnews.com/me/maine/politics/2025/06/12/democrat-enters-race-to-challenge-maine-sen--susan-collins
  51. Associated Press
    https://apnews.com/article/maine-mills-senate-trump-collins-e669e25547d5343cee5c3431e14e09b4
  52. ABC News
    https://abcnews.go.com/Politics/graham-platner-oysterman-harbormaster-rural-maine-enters-race/story?id=124758156
  53. Bangor Daily News
    https://www.bangordailynews.com/2025/04/23/politics/jordan-wood-democrat-with-national-ties-announces-2026-challenge-susan-collins-joam40zk0w/
  54. FEC.gov
    https://www.fec.gov/data/candidate/S6ME00340/
  55. Bangor Daily News
    https://www.bangordailynews.com/2025/09/03/politics/maine-beer-company-cofounder-dan-kleban-running-democratic-nomination-susan-collins-2026-joam40zk0w/
  56. The New York Times
    https://www.nytimes.com/2025/09/03/us/politics/democrats-maine-senate-race.html
  57. Maine Public
    https://www.mainepublic.org/politics/2025-07-21/who-will-challenge-susan-collins-in-2026
  58. Politico
    https://www.politico.com/live-updates/2025/05/20/congress/jared-golden-reelection-2026-00358438
  59. Portland Press Herald
    https://www.pressherald.com/2025/05/27/who-will-maine-democrats-run-against-susan-collins/
  60. Reuters
    https://www.reuters.com/world/us/democratic-maine-governor-janet-mills-takes-us-senator-susan-collins-2025-10-14/
  61. The Hill
    https://thehill.com/homenews/campaign/5565965-schumer-endorses-mills-maine/
  62. The Hill
    https://thehill.com/homenews/5553968-emilys-list-backs-gov-janet-mills-in-maine-senate-race/
  63. Politico
    https://www.politico.com/news/2025/08/30/bernie-sanders-endorsement-maine-graham-platner-00538084
  64. Intelligencer
    https://nymag.com/intelligencer/article/graham-platner-reddit-comments-janet-mills.html
  65. NBC News
    https://www.nbcnews.com/politics/2026-election/democrats-are-facing-well-funded-primary-challengers-party-reckons-fut-rcna237798
  66. Current Affairs
    https://www.currentaffairs.org/news/graham-platner-and-the-lefts-masculinity-crisis
  67. Senate candidate Graham Platner hosts town hall event in Portland
    https://www.youtube.com/watch?v=juYu5GV0tN8
  68. BostonGlobe.com
    https://www.bostonglobe.com/2025/11/03/nation/graham-platner-maine-janet-mills/
  69. WMTW
    https://www.wmtw.com/article/graham-platners-political-director-resigns-over-candidates-controversial-comments/69078524
  70. The Nation
    https://www.thenation.com/?post_type=article&p=568222
  71. The Bulwark
    https://www.thebulwark.com/p/maine-senate-primary-fight-for-soul-democratic-party-graham-platner-janet-mills
  72. The New York Times
    https://www.nytimes.com/2025/10/31/opinion/graham-platner-democrats.html
  73. The Hill
    https://thehill.com/homenews/5553961-democratic-youth-focused-groups-endorse-graham-platner-maine-senate-race/
  74. Boston.com
    https://www.boston.com/culture/politics/2025/09/07/watch-dropkick-murphys-blast-trump-but-stump-for-a-longshot-new-england-candidate/
  75. The New Republic
    https://newrepublic.com/article/199682/graham-platner-maine-senate-profile
  76. Lewiston Sun Journal
    https://www.sunjournal.com/2025/09/01/bernie-sanders-backs-graham-platner-troy-jackson-at-portland-labor-day-rally-2
  77. IFPTE
    https://www.ifpte.org/news/ifpte-endorses-graham-platner-for-senate
  78. WMTW-TV
    https://www.wmtw.com/article/graham-platner-troy-jackson-endorsed-maine-state-nurses-association/67952381
  79. UAW
    https://uaw.org/uaw-endorses-graham-platner-for-u-s-senate-in-maine/
  80. "Why settle for 2025 endorsements when we can get a jump on 2026! Progressive Victory is excited to endorse @grahamformaine for Maine's Senate seat! A progressive willing to fight Democrats and Republicans…sign me up!"
    https://x.com/ProgressiveVic/status/1979219004645310683
  81. WMTW
    https://www.wmtw.com/article/maine-2026-senate-race-janet-mills-graham-platner-jordan-wood-endorsements-fundraising/69042875
  82. votecommongood.podbean.com
    https://votecommongood.podbean.com/e/maine-senate-democrat-candidate-jordan-wood-for-the-common-good/
  83. Patriotic Millionaires
    https://patrioticmillionaires.org/people/jordan-wood/
  84. Maine Morning Star
    https://mainemorningstar.com/2025/09/03/maine-beer-company-founder-joins-race-against-susan-collins/
  85. Politico
    https://www.politico.com/news/2025/10/09/graham-platner-senate-democrats-00599107
  86. Substack
    https://substack.com/inbox/post/177116687
  87. "NRSC poll"
    https://x.com/PollTracker2024/status/1981748796221456736
  88. National Review
    https://www.nationalreview.com/corner/ex-democrat-spacex-engineer-challenging-maine-senator-susan-collins-as-an-independent/
  89. Inside Elections
    https://www.insideelections.com/ratings/senate
  90. Cook Political Report
    https://www.cookpolitical.com/ratings/senate-race-ratings
  91. Sabato's Crystal Ball
    https://centerforpolitics.org/crystalball/2026-senate/
  92. Race to the WH
    https://www.racetothewh.com/senate/26
  93. More Perfect Union
    https://perfectunion.us/wp-content/uploads/2025/10/More-Perfect-Union_-Maine-Senate-General-Election-Benchmark-Poll.pdf
  94. "Kleban PPP Poll Memo 9.16.25"
    https://s3.documentcloud.org/documents/26100765/me-sen-public-policy-polling-d-for-dan-kleban-sept-2025.pdf
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