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Race · U.S. House · Massachusetts · 2026

Massachusetts District 3 · U.S. House · 2026

Seat U.S. House, Massachusetts District 3

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Race header

U.S. House, Massachusetts District 3 · Incumbent running
DEMNominee
Lori Loureiro Trahan incumbent
99%Hume Outlook · Hume model estimate · as of 2026-10-28
INDOn the ballot
Dennis R. Conlon
—Not published for this candidate
REPNominee
Gary J. Grossi
1%Hume Outlook · Hume model estimate · as of 2026-10-28
IncumbentLori Loureiro Trahan

Hume Outlook

hume-2026.10-r1 · Forecast as of Oct 28, 2026
99% Lori Loureiro Trahan · DemocratChance to win, between the two named candidates
DEM Lori Loureiro Trahan 99%
REP Gary J. Grossi 1%
  • Hume model estimate · built on polls, fundamentals, and markets
Latest poll Not available No public polls of this race in our data yet.
Seat lean (Hume PVI) D+11 as of cycle 2020
Prior result, this seat DEM 100.0% 2024 general · margin not in file

Side by side

3 candidates · 5 measures
FEC summary through 2026-10-14
MeasureDEMTrahanINDConlonREPGrossi
Total receiptsUSD, cycle to date, all authorized committees
Lori Loureiro Trahan$1,878,706.73
Dennis R. ConlonNot available No FEC summary is available for this candidate.
Gary J. Grossi$9,150.83
Total disbursementsUSD, cycle to date
Lori Loureiro Trahan$1,542,590.81
Dennis R. ConlonNot available No FEC summary is available for this candidate.
Gary J. Grossi$1,773.01
Cash on handUSD, close of the covered period
Lori Loureiro Trahan$1,791,267.16
Dennis R. ConlonNot available No FEC summary is available for this candidate.
Gary J. Grossi$7,377.82
Latest pollpercent, as stored
Lori Loureiro TrahanNot available No public polls of this race in our data yet.
Dennis R. ConlonNot available No public polls of this race in our data yet.
Gary J. GrossiNot available No public polls of this race in our data yet.
Seat lean (Hume PVI)identical for every candidate
Lori Loureiro TrahanD+11seat-level
Dennis R. ConlonD+11seat-level
Gary J. GrossiD+11seat-level
Money is each candidate's FEC summary: every committee the candidate has authorized, combined, as filed through the coverage date shown.

Polling

0 listed · newest first

Not available No public polls of this race in our data yet.

    Seat lean · Hume PVI

    as of cycle 2020
    D+11
    Lean (D minus R, points)
    +11.310

    Hume PVI is Hidden Levers' own two-party presidential-lean index for the district, computed on the district's current lines, not the Cook PVI.

    Prior result, this seat

    election returns

    2024 general

    CandidatePartyVotes% of total
    Lori Loureiro TrahanDEM264,698100.00%

    Total votes 264,698 · winning margin Not available of total

    Sources: FEC filings (through Oct 14, 2026) · Prior result: MIT Election Data + Science Lab (CC0) · Hume PVI and Hume Outlook: Hidden Levers estimates.

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