Rhode Island 2026 — after the primaries

Rhode Island's September 8 primaries resolved and the nominee boards that carried this workspace through the summer have settled. What survives is a general election in which both statewide races are priced as done: Jack Reed holds the Senate seat at 98.9% on Kalshi and 99.3% on Polymarket, and Helena Foulkes—who beat the incumbent on a book that priced him at 1.9%—holds the governorship at 96.7% on Kalshi and 97.1% on Polymarket.

The one question with a distribution left is the margin. Polymarket's gubernatorial margin board now has a modal bucket, Democrat 20–25% at 25.45%, but no favorite: 15–20% sits at 18.5% and 25–30% at 16.5%.

Almost nothing here trades. Both governor boards turned nothing at all in the last 24 hours, against $16,105 of standing open interest on Kalshi's. The state's whole political day was $99 on Kalshi's Senate long shot and $64 on one margin bucket. This is what a settled state looks like four weeks before an election.

Reed at 98.9% on Kalshi against 99.3% on Polymarket. The two-point gap that held for weeks has closed, and Polymarket now sits a fraction above Kalshi on the same outcome.

Raymond McKay takes all $99 of Kalshi's Senate day while priced at 1%, against $2,496 of open interest; Reed's leg traded nothing. Polymarket's McKay leg, at 0.65%, turned nothing at all, after taking 95% of that board's day at the last review. When a race is settled, the only liquid contract left is the lottery ticket.

Polymarket's board on the left, Kalshi's on the right, at 97.1% and 96.7% for Foulkes. The two exchanges sit within half a point and neither book is trading—both turned zero, where Polymarket's took $114 at the last review.

The margin board is the only Rhode Island contract with a real distribution left in it: Democrat 20–25% leads at 25.45% with no bucket near a majority, and its only trade in a day was $64 on Democrat 10–15%. Beside it, the Lieutenant Governor board—Democratic party at 95.5%, quoted and untouched with no open interest, which is the normal condition of a down-ballot race in a state whose top line is settled.

Kalshi's commercial quahog landings board is the one Rhode Island market here that isn't an election. It turned nothing in 24 hours, from $3,119 at the last review, and holds $8,342 of open interest. The ladder's open question sits between Above 250,000 meat pounds at 66.5% and Above 280,000 at 29.5%; Above 310,000 is at 15.5%, from 18%. It settles in July 2027.

Watch the margin board narrow. It has started to: Democrat 20–25% now leads at 25.45%, with 15–20% at 18.5% and 25–30% at 16.5%. As polling firms publish Rhode Island numbers through October the distribution should narrow further, and the direction it narrows is the only real information this state produces before November 3.

Watch the Senate quotes. Kalshi at 98.9% and Polymarket at 99.3% on Reed: the two-point gap from the last review has closed and flipped. Nothing about the underlying is in dispute, which makes any spread a clean read on cross-exchange friction.

Watch the open interest unwind. Kalshi's governor board holds $16,105 against zero volume. Positions on a resolved question are inventory nobody has bothered to close, and when it clears it will look like volume without being information.