Will Seth Moulton be the Democratic nominee for Senate in Massachusetts?
Crossbook compares what two exchanges, Polymarket and Kalshi, charge for the same event, and publishes a permanent scored record of its own forecasts under published rules.
Settlement equivalence unverified. No eligible price gap is available.
Bid/ask midpoint · retrieved 2026-08-31T23:50:28.217Z. Venue quote-update time is unavailable. Readings can be asynchronous.
0.7%bid 0.1% / ask 1.3%24h volume $288 · liquidity $22Kas of 31 Aug, 23:50 UTC · not refreshed recentlyView on PolymarketBid/ask midpoint · retrieved 2026-09-02T00:05:29.061Z. Venue quote-update time is unavailable. Readings can be asynchronous.
0.7%bid 0.3% / ask 1.1%24h volume $1.7M · liquidity –as of 2 Sept, 00:05 UTC · not refreshed recentlyView this market's series on KalshiHow each venue defines this
Each exchange's own settlement text, quoted as written. Where they differ, the difference is usually why the prices do.
Settles Sep 1, 26
This market will resolve according to the winner of the Democratic Primary for United States Senator from Massachusetts. If no 2026 Massachusetts Democratic Senate Primary takes place, this market will resolve to "Other". The resolution source for this market will be the first announcement of the results from the Massachusetts Democratic party, however an overwhelming consensus of credible reporting may suffice.
Settles Sep 15, 26
If Seth Moulton wins the nomination for the Democratic Party to contest the Class II Massachusetts Senate seat in 2026, then the market resolves to Yes.
Settlement basis
Settlement equivalence unverified
A person confirmed these two markets ask the same question. Their settlement documents have not been compared, so treat the price difference as unverified rather than as a like for like gap.
Confirmed as the same question: Will Seth Moulton be the Democratic nominee for Senate in Massachusetts?
Price, last 60 days
Crossbook forecast
No public Crossbook forecast on this market yet. Every call that is made is timestamped and scored on the public record, win or lose.
Context
Settlement equivalence unverified. The venue readings below are not ranked as a comparable price gap.
Volume over the last 24 hours is heavy, at about $1,694,087 on the busier venue.
This market has settled. The page is kept as a record of what both venues said while the question was open, and of what Crossbook called.
Related markets
- 2026 Balance of Power: R Senate, R House
- Ohio Governor winner?: Vivek Ramaswamy
- Will Alexandria Ocasio-Cortez win the 2028 Democratic presidential nomination?
- Will Alexandria Ocasio-Cortez win the 2028 US Presidential Election?
- Will Alina Habba be the next White House Press Secretary?
- Will Andy Beshear win the 2028 Democratic presidential nomination?
Crossbook publishes every forecast it makes, timestamped before the answer is known and scored against the market afterwards. See the public record and the rules it is held to.