Riding profile

MA-3

US House district — MA · Mixed · us ma

The question

MA-3: a safe seat for the Democrats?

Current forecast

Democrat

Safe

Probability
100%
Mean margin (pts)
52.2
P(close race)
0%

Projected vote share

Projection by party

  • Democrat 76.1%

    Lori Trahan incumbent

  • Other 23.9%

Watch list

The tightest races

Smallest projected margin. Open one for the numbers.

  1. FL-22Democrat68 %1.1 pt margin
  2. AZ-2Republican57 %1.1 pt margin
  3. OH-10Democrat60 %1.1 pt margin

In context

How this riding stacks up

Democrat Other
HereMA-3 76.1%23.9%
National averageUnited States 54.3% +21.8 5.1% +18.8

Nationwide averages computed across the 435 riding-level projections (unweighted mean).

Projection track

How the projection has moved

Editorial read

MA-3, a mixed riding in MA, elected a member with the Democrats in the previous cycle, with a 46-point margin. The Vote-Scope model projects the Democrats ahead at 76% vote share, against 24% for another party, and the probability of a close race is negligible.

Sitting member

TRAHAN, LORI

Sits with Democrat

Primary race

Primary results

Held Sep 1, 2026 · Official count — not yet certified

Democratic primary

Winner

Lori Loureiro Trahan 100.0%

Republican primary

Winner

Gary J. Grossi 100.0%

Official source →

Who's running

The candidates

Declared and on-ballot candidates for the upcoming election.

  • Democrat Incumbent

    Trahan, Lori

  • Republican Challenger

    Grossi, Gary J.

Previous election · 2024

Won by
Democrat
Margin
46.0 pts
Margin shift vs current projection
+6.3 pts
Last model run
Cycle
us_house_2026