Called Nov 3Unofficial results

Massachusetts's 3rd District

U.S. House · Massachusetts

Lori Loureiro Trahan won re-election by 36.8 points over Gary J. Grossi.

Lori Loureiro TrahanDemocrat · winner · incumbent
67.2%173,326
Gary J. GrossiRepublican
30.3%78,296
Dennis R. ConlonIndependent
2.5%6,442
77% of the expected vote counted · 258,064 votes

Source: civicAPI unofficial results and race callsUpdated Nov 7, 2026, 3:00 PM ET

Where the race moved

Against the 2024 presidential vote

The seat's recent races

EvenD+27.12022 HouseD+19.42024 Pres.D+36.82026 House

Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)

Money in this race

Each line compares the two campaigns on one scale.

Lori TrahanGary Grossi
$1.9M
Raised by the campaign
$9.2K
$1.5M
Spent by the campaign
$1.8K
$1.8M
Cash on hand
$7.4K

Campaign money: FEC, through Oct 14, 2026.

Source: FEC campaign filingsUpdated Oct 14, 2026

Pre-election forecast (final, Nov 3)

Our model's last run before Election Day, Nov 3, 2026. It no longer updates.

Lori Trahan
>99%
Gary Grossi
<1%
Projected margin
D+41.1
How the forecast works →

The candidates

Lori Loureiro Trahan (D)Gary J. Grossi (R)

Also on the ballot: Dennis R. Conlon (Independent), 2.5%

Changes to this page

  • · Race called for Trahan.