Race2026 cycle · Special electionsPrimary day 1 Sep 2026Updated

Cite this page

DonorAlpha, “Massachusetts Senate primary 2026”, https://donoralpha.com/races/massachusetts-senate-primary-2026?e=c2026&el=special, updated .

Massachusetts Senate primary 2026

No. 26 of 68 Senate races in the 2026 cycle

This race is in the 2026 primaries.

The short version

In the 2026 Massachusetts Senate primary, 6 outside groups spent $7.9M: $2.3M supporting Seth Moulton (D), $2.2M opposing Seth Moulton, $42,936 supporting Edward Markey (D) and $3.3M opposing Edward Markey.

The result, as reportedunofficial

  • DemocraticEdward Markey64.7%Won
  • RepublicanJohn Deaton99.3%Won

In the 2026 Massachusetts Senate primary, Edward Markey won the Democratic ballot with 64.7% of the vote and John Deaton won the Republican ballot with 99.3% of the vote.

$7.9M

outside money

supporting Seth Moulton (D)
$2.3M
opposing Seth Moulton (D)
$2.2M
supporting Edward Markey (D)
$42,936
opposing Edward Markey (D)
$3.3M

Outside money supporting and opposing each candidate

Both sides on one scale
← OpposingSupporting →
  • Seth Moulton Democrat

    $2.2M
    $2.3M

    $2.3M supporting Seth Moulton · $2.2M opposing Seth Moulton

  • Edward Markey Democrat

    $3.3M
    $42,936

    $42,936 supporting Edward Markey · $3.3M opposing Edward Markey

The long version

The candidates

What each candidate’s own campaign raised, beside what outside groups spent supporting and opposing them.

  • Seth Moulton

    Democrat

    Own campaign raised
    $6.2M
    Outside money supporting
    $2.3M
    Outside money opposing
    $2.2M
    Seth for Massachusetts
  • Edward Markey

    Democrat

    Own campaign raised
    $5.4M
    Outside money supporting
    $42,936
    Outside money opposing
    $3.3M
    The Markey Committee
  • Campaign money to 12 Aug 2026

Week by week

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

Week of 24 Aug 2026

Supporting $842KOpposing $1.3M

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. Advance Progresssupporting Seth Moulton$2.3M
  2. NRDC Action Votessupporting Edward Markey$24,929
  3. Givegreen United Actionsupporting Edward Markey$80
  4. Sierra Club Independent Actionsupporting Edward Markey$10

Spent opposing a candidate

  1. Advance Progressopposing Edward Markey$3.3M
  2. Commonwealth Together PACopposing Seth Moulton$2.2M

Who’s connected to whom

The groups that spent supporting or opposing the candidates.

Their biggest giversGroups that spentCandidatesAdvance Progress spent $3.3M opposing Edward Markey · $3.3MAdvance Progress spent $2.3M supporting Seth Moulton · $2.3MCommonwealth Together PAC spent $2.2M opposing Seth Moulton · $2.2MNRDC Action Votes spent $24,929 supporting Edward Markey · $24,929National Association of Realtors Political Action Committee spent $17,917 supporting Edward Markey · $17,917Givegreen United Action spent $80 supporting Edward Markey · $80Sierra Club Independent Action spent $10 supporting Edward Markey · $10MA Progress Action (AZ) gave $580K to Advance Progress · $580KBaker Family Trust gave $250K to Advance Progress · $250K1199 SEIU - MA PAC gave $125K to Commonwealth Together PAC · $125KAFSCME gave $100K to Commonwealth Together PAC · $100KNRDC Action Fund gave $3.1M to NRDC Action Votes · $3.1MLeague of Conservation Voters gave $946K to Givegreen United Action · $946KNRDC Action Fund gave $922K to Givegreen United Action · $922KMA Progress Action (AZ)MA Progress Action (AZ)Company or group · $580KBaker Family TrustBaker Family TrustCompany or group · $250K1199 SEIU - MA PAC1199 SEIU - MA PACCompany or group · $125KAFSCMEAFSCMECompany or group · $100KNRDC Action FundNRDC Action FundCompany or group · $3.1MLeague of ConservationVotersLeague of Conservation VotersCompany or group · $946KNRDC Action FundNRDC Action FundCompany or group · $922KAdvance ProgressAdvance ProgressGroup · $5.6MCommonwealth Together PACCommonwealth Together PACGroup · $2.2MNRDC Action VotesNRDC Action VotesGroup · $24,929National Association ofRealtors Political ActionCommitteeNational Association of Realtors Political Action CommitteeGroup · $17,917Givegreen United ActionGivegreen United ActionGroup · $80Sierra Club IndependentActionSierra Club Independent ActionGroup · $10Seth MoultonSeth MoultonCandidate · $4.5MEdward MarkeyEdward MarkeyCandidate · $3.4M
  • Advance Progress spent opposing Edward Markey · $3.3M
  • Advance Progress spent supporting Seth Moulton · $2.3M
  • Commonwealth Together PAC spent opposing Seth Moulton · $2.2M
  • NRDC Action Votes spent supporting Edward Markey · $24,929
  • National Association of Realtors Political Action Committee spent supporting Edward Markey · $17,917
  • Givegreen United Action spent supporting Edward Markey · $80
  • Sierra Club Independent Action spent supporting Edward Markey · $10
  • MA Progress Action (AZ) gave to Advance Progress · $580K
  • Baker Family Trust gave to Advance Progress · $250K
  • 1199 SEIU - MA PAC gave to Commonwealth Together PAC · $125K
  • AFSCME gave to Commonwealth Together PAC · $100K
  • NRDC Action Fund gave to NRDC Action Votes · $3.1M
  • League of Conservation Voters gave to Givegreen United Action · $946K
  • NRDC Action Fund gave to Givegreen United Action · $922K
GaveSpent supportingSpent opposingSwipe to see the whole map.

Group

Advance Progress

  • Advance Progress spent $3.3M opposing Edward Markey$3.3M
  • Advance Progress spent $2.3M supporting Seth Moulton$2.3M
  • MA Progress Action (AZ) gave $580K to Advance Progress$580K
  • Baker Family Trust gave $250K to Advance Progress$250K
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