Massachusetts 3rd — House 2026 Dem Primary
The Massachusetts 3rd — House dem primary is scheduled for September 1, 2026. The model makes Lori Trahan the heavy favorite at 97%, with Gaige Clark at 3%. Lori Trahan is the incumbent, leads the field in reported fundraising, and has the most tracked endorsements. No public polling is available for this race, so the forecast leans on fundraising, endorsements, candidate profiles, and historical results.
Current win probabilities
- Lori Trahan (incumbent) — 97%
- Gaige Clark — 3%
Probabilities update daily from polls, fundraising, endorsements, and historical results.