MA-03 House race
Election day: Tuesday, November 3, 2026
Market odds
Chance of winning, from prediction-market prices
99% Dem
Rep 1%
| Market | Outcome | Chance |
|---|---|---|
| Polymarket (opens in a new tab) | Lori Trahan | 97% |
| Gary Grossi | 1% |
View data as table
| Series | First | Latest |
|---|---|---|
| Polymarket · Democrats | 5/1/2026: 92% | 10/28/2026: 97% |
| Polymarket · Republicans | 5/1/2026: 8% | 10/28/2026: 1% |
Poll average
No polls of this race yet.
On the ballot
Results appear here as votes are counted on election night.
| Candidate | Party |
|---|---|
| Lori Loureiro Trahan | Democrat |
| Gary J. Grossi | Republican |
| Dennis R. Conlon | Other |