Lori Trahan*
DEMOCRATIC
US House of Representatives (D-MA)
2019 – Present
Massachusetts3rd District2026 HOUSE FORECAST
Gary Grossi
REPUBLICAN
US Army
2026 Massachusetts 3rd District House Forecast:
Proprietary forecast for Massachusetts's 3rd congressional district House election between Democrat Lori Trahan and Republican Gary Grossi. This page will update with a daily set of 100,000 new simulations as race fundamentals change in order to produce race odds, projected margin, and forecasted vote share. This page also includes polling averages when available.
The 2026 Massachusetts 3rd District House election features Democrat Lori Trahan and Republican Gary Grossi. Incumbent Representative Lori Trahan is seeking reelection to a fifth term. In 2024, Kamala Harris won Massachusetts' 3rd congressional district by 7.5%, and the election for the district's House seat is rated as solid Democratic in 2026.
- Year
- 2026
- Race
- House
- District
- MA-3
- Democratic candidate
- Lori Trahan
- Republican candidate
- Gary Grossi
- Incumbent / open seat
- Lori Trahan
- Forecast rating
- Solid D
- Projected vote
- 70.1% D / 29.9% R
- Projected margin
- D +40.2
- Forecast odds
- 99.9% D / 0.1% R
- Forecast last updated
- 12:00 AM on July 2, 2026
- Polling average
- —
- Polling average margin
- —
- Polling last updated
- —
- Polls included
- 0
- Latest poll
- —