MA-03 House Election Winner — odds by venue
| Outcome | Polymarket | Kalshi | Best price |
|---|---|---|---|
| Gary Grossi (R) | 5.1% | — | 5.1% on Polymarket |
Venues
- Polymarket: Volume $23.3K · Liquidity $27.7K · Price time —
- Kalshi: Volume $2K · Liquidity $2K · Price time —
Resolution rules
Polymarket
This market will resolve according to the party of the candidate who wins the MA-03 congressional district seat in the U.S. House of Representatives in the 2026 midterm elections. The midterm elections will take place on November 3, 2026. A candidate's party will be determined by their ballot-listed or otherwise identifiable affiliation with that party at the time all of the 2026 House elections are conclusively called by this market's resolution sources. A candidate without a ballot-listed affiliation to either the Democrat or Republican parties will be considered a member of one of these…
Kalshi
If the House member sworn in for MA-03 for the term beginning in 2027 is a member of the Republican Party, then the market resolves to Yes. This market is eligible for accelerated determination after a consensus of media organizations project the winner. See full rules for details.