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Race2026 cycle · General electionElection day 3 Nov 2026Updated

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DonorAlpha, “Maine Senate general 2026”, https://donoralpha.com/races/maine-senate-general-2026, updated .

Maine Senate general 2026

Prediction market7 Oct 2026

Troy Jackson 57.5% · prediction market price

No. 6 of 27 Senate races in the 2026 general election

The short version

In the 2026 Maine Senate general election, 40 outside groups spent $68.8M: $8.8M supporting Troy Jackson (D), $39.5M opposing Troy Jackson, $2.8M supporting Susan Collins (R) and $12.4M opposing Susan Collins.

$68.8M

outside money

supporting Troy Jackson (D)
$8.8M
opposing Troy Jackson (D)
$39.5M
supporting Susan Collins (R)
$2.8M
opposing Susan Collins (R)
$12.4M

Result not in yet

Election day is 3 Nov 2026.

  • Troy Jackson

    Democrat

    Waiting for the count

  • Susan Collins

    Republican

    Waiting for the count

Outside money supporting and opposing each candidate

Both sides on one scale
← OpposingSupporting →

  • Troy Jackson Democrat

    $39.5M
    $8.8M

    $8.8M supporting Troy Jackson · $39.5M opposing Troy Jackson

  • Susan Collins Republican

    $12.4M
    $2.8M

    $2.8M supporting Susan Collins · $12.4M opposing Susan Collins

The long version

The candidates

What each candidate’s own campaign raised, beside what outside groups spent supporting and opposing them, and what party committees spent working with the campaign.

Graham Platner won the primary and withdrew on 10 Jul 2026; the party named Troy Jackson on 27 Jul 2026.

  • Troy Jackson

    Democrat

    Outside money supporting
    $8.8M
    Outside money opposing
    $39.5M

    Party spending with the campaign

    $384K

    DSCC $366KMaine Democratic Party $17,557

  • Susan Collins

    Republican

    Own campaign raised
    $16.2M
    Outside money supporting
    $2.8M
    Outside money opposing
    $12.4M

    Party spending with the campaign

    $3.5M

    NRSC $3.5M

    Collins for Senator
  • Campaign money to 30 Jun 2026

Week by week

Outside money each week, supporting and opposing the candidates, all candidates combined.

Week of 5 Oct 2026

Supporting $1,097Opposing $1.8M

Supporting candidatesOpposing candidates

The groups on each side

The biggest outside groups in this race, by what they spent supporting or opposing each candidate.

Spent supporting a candidate

  1. WinSenatesupporting Troy Jackson$5.4M
  2. Government That Works PACsupporting Troy Jackson$1.6M
  3. Stronger Mainesupporting Susan Collins$842K
  4. America's Credit Unionssupporting Susan Collins$803K
  5. CFFE PACsupporting Troy Jackson$691K
  6. Lead Maine Committeesupporting Susan Collins$501K
  7. National Nurses United for Patient Protectionsupporting Troy Jackson$485K
  8. One for All Committeesupporting Troy Jackson$378K

Spent opposing a candidate

  1. Senate Leadership Fundopposing Troy Jackson$20.3M
  2. Pine Tree Results PACopposing Troy Jackson$13.0M
  3. WinSenateopposing Susan Collins$9.7M
  4. Pine Tree Results PACopposing Graham Platner$4.9M
  5. The Maine Standardopposing Troy Jackson$3.8M
  6. Stronger Maineopposing Troy Jackson$1.1M
  7. End Citizens United Action Fundopposing Susan Collins$1.0M
  8. Planned Parenthood Votesopposing Susan Collins$792K

Who’s connected to whom

The groups that spent supporting or opposing the candidates.

Their biggest giversGroups that spentCandidatesSenate Leadership Fund spent $20.3M opposing Troy Jackson · $20.3MPine Tree Results PAC spent $13.0M opposing Troy Jackson · $13.0MWinSenate spent $9.7M opposing Susan Collins · $9.7MWinSenate spent $5.4M supporting Troy Jackson · $5.4MPine Tree Results PAC spent $4.9M opposing Graham Platner · $4.9MThe Maine Standard spent $3.8M opposing Troy Jackson · $3.8MGovernment That Works PAC spent $1.6M supporting Troy Jackson · $1.6MStronger Maine spent $1.1M opposing Troy Jackson · $1.1MEnd Citizens United Action Fund spent $1.0M opposing Susan Collins · $1.0MStronger Maine spent $842K supporting Susan Collins · $842KLead Maine Committee spent $787K opposing Troy Jackson · $787KLead Maine Committee spent $501K supporting Susan Collins · $501KGovernment That Works PAC spent $351K opposing Susan Collins · $351KLead Maine Committee spent $116K opposing Graham Platner · $116KOne Nation gave $70.7M to Senate Leadership Fund · $70.7MChevron Corporation gave $3.9M to Senate Leadership Fund · $3.9MStronger America (TX) gave $3.0M to Pine Tree Results PAC · $3.0MLexington Fund (TX) gave $1.3M to Pine Tree Results PAC · $1.3MSMP gave $21.1M to WinSenate · $21.1MResponsive Government Action gave $7.0M to Government That Works PAC · $7.0MCivitech, PBC (TX) gave $3.0M to Government That Works PAC · $3.0MStronger America (VA) gave $1.4M to Stronger Maine · $1.4MCommon Sense Leadership Fund gave $500K to Stronger Maine · $500KOne NationOne NationCompany or group · $70.7MChevron CorporationChevron CorporationCompany or group · $3.9MStronger America (TX)Stronger America (TX)Company or group · $3.0MLexington Fund (TX)Lexington Fund (TX)Company or group · $1.3MSMPSMPCompany or group · $21.1MResponsive Government ActionResponsive Government ActionCompany or group · $7.0MCivitech, PBC (TX)Civitech, PBC (TX)Company or group · $3.0MStronger America (VA)Stronger America (VA)Company or group · $1.4MCommon Sense Leadership FundCommon Sense Leadership FundCompany or group · $500KSenate Leadership FundSenate Leadership FundGroup · $20.3MPine Tree Results PACPine Tree Results PACGroup · $17.9MWinSenateWinSenateGroup · $15.1MThe Maine StandardThe Maine StandardGroup · $3.8MGovernment That Works PACGovernment That Works PACGroup · $2.0MStronger MaineStronger MaineGroup · $1.9MLead Maine CommitteeLead Maine CommitteeGroup · $1.4MEnd Citizens United ActionFundEnd Citizens United Action FundGroup · $1.0MTroy JacksonTroy JacksonCandidate · $48.3MSusan CollinsSusan CollinsCandidate · $15.2MGraham PlatnerGraham PlatnerCandidate · $5.3M
  • Senate Leadership Fund spent opposing Troy Jackson · $20.3M
  • Pine Tree Results PAC spent opposing Troy Jackson · $13.0M
  • WinSenate spent opposing Susan Collins · $9.7M
  • WinSenate spent supporting Troy Jackson · $5.4M
  • Pine Tree Results PAC spent opposing Graham Platner · $4.9M
  • The Maine Standard spent opposing Troy Jackson · $3.8M
  • Government That Works PAC spent supporting Troy Jackson · $1.6M
  • Stronger Maine spent opposing Troy Jackson · $1.1M
  • End Citizens United Action Fund spent opposing Susan Collins · $1.0M
  • Stronger Maine spent supporting Susan Collins · $842K
  • Lead Maine Committee spent opposing Troy Jackson · $787K
  • Lead Maine Committee spent supporting Susan Collins · $501K
  • Government That Works PAC spent opposing Susan Collins · $351K
  • Lead Maine Committee spent opposing Graham Platner · $116K
  • One Nation gave to Senate Leadership Fund · $70.7M
  • Chevron Corporation gave to Senate Leadership Fund · $3.9M
  • Stronger America (TX) gave to Pine Tree Results PAC · $3.0M
  • Lexington Fund (TX) gave to Pine Tree Results PAC · $1.3M
  • SMP gave to WinSenate · $21.1M
  • Responsive Government Action gave to Government That Works PAC · $7.0M
  • Civitech, PBC (TX) gave to Government That Works PAC · $3.0M
  • Stronger America (VA) gave to Stronger Maine · $1.4M
  • Common Sense Leadership Fund gave to Stronger Maine · $500K
GaveSpent supportingSpent opposingSwipe to see the whole map.

Group

Senate Leadership Fund

  • Senate Leadership Fund spent $20.3M opposing Troy Jackson$20.3M
  • One Nation gave $70.7M to Senate Leadership Fund$70.7M
  • Chevron Corporation gave $3.9M to Senate Leadership Fund$3.9M

Polls

Every poll of this race on one timeline.

The average of 9 polls to 4 Oct 2026 has Troy Jackson at 48.7% and Susan Collins at 46.7%.

9polls in the average

polls of this race
42
pollsters
21

Troy JacksonSusan Collins

Marist University1 Oct to 4 Oct 2026 · 1,505 registered voters
DemocraticTroy Jackson51.0%
RepublicanSusan Collins47.0%

Point at a dot, or tab in and use the arrow keys

Every poll, newest first

  1. 4 Oct ’26Marist University 1 Oct to 4 Oct 2026 · 1,505 registered votersTroy Jackson 51.0%Susan Collins 47.0%
  2. 1 Oct ’26Wedgewood Polls 27 Sep to 1 Oct 2026 · 400 likely votersTroy Jackson 52.0%Susan Collins 48.0%
  3. 30 Sep ’26co/efficient 28 Sep to 30 Sep 2026 · 1,240 likely votersTroy Jackson 46.0%Susan Collins 48.0%
  4. 22 Sep ’26Fabrizio, Lee & Associates/Impact Research 20 Sep to 22 Sep 2026 · 982 likely votersTroy Jackson 50.0%Susan Collins 47.0%
  5. 22 Sep ’26The New York Times/Siena University 15 Sep to 22 Sep 2026 · 619 likely votersTroy Jackson 46.0%Susan Collins 49.0%
  6. 21 Sep ’26University of New Hampshire 17 Sep to 21 Sep 2026 · 1,312 likely votersTroy Jackson 51.0%Susan Collins 47.0%
  7. 15 Sep ’26Quantus Insights 14 Sep to 15 Sep 2026 · 621 likely votersTroy Jackson 46.4%Susan Collins 47.1%
  8. 14 Sep ’26University of Massachusetts Lowell Center for Public Opinion/YouGov 28 Aug to 14 Sep 2026 · 650 likely votersTroy Jackson 48.0%Susan Collins 43.0%
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