North Carolina’s former governor Roy Cooper is the Democratic nominee for the state’s open U.S. Senate seat. Traders treat a Democratic win as very likely — even as July polling still shows a single-digit race against Republican nominee Michael Whatley.
You’re betting on whether a Democrat holds North Carolina’s Senate seat for the term that begins in 2027. After the winner is sworn in, only one side gets paid.
| Your bet | Chance | Wins if… | $100 bet pays |
|---|---|---|---|
| Democrats | 91% | A Democrat is sworn in for the 2027 term — in this race, that means nominee Roy Cooper | ~$109 |
| Republicans | 9% | A Republican is sworn in for that term — in this race, that means nominee Michael Whatley | ~$959 |
Kalshi pays from who is sworn in for the 2027 term. Election Day is November 3, 2026.
The case for Democrats. At 91%, traders already treat a Democratic hold as the clear favorite. Roy Cooper, North Carolina’s former two-term governor, won his March primary with about 92% of the vote and enters as one of the state’s best-known politicians — Public Policy Polling found 92% of voters familiar with him in July, against 69% for Republican Michael Whatley. A New York Times/Siena College poll published July 1 put Cooper ahead 50% to 43%. Cooper’s campaign said it raised $14.8 million in the second quarter of 2026, bringing his campaign’s cycle total past $40 million, while Whatley’s campaign reported about $5 million for the same quarter. Name recognition, a lead in multiple summer polls, and a campaign cash edge are why Democrats sit at 91%.
The case for Republicans. Traders still leave about 9% on Republicans. The closest recent poll is Public Policy Polling (July 10–11, 759 voters): Democrat Roy Cooper at 48% and Republican Michael Whatley at 44%, with 8% undecided — a smaller Cooper lead than in most other surveys this year. Most of those undecided voters had supported Trump for president in 2024; if they pick Whatley in November, that poll found he would lead Cooper 51% to 49%. Whatley, former chair of the Republican National Committee and the North Carolina Republican Party, has President Donald Trump’s endorsement, said he finished a tour of all 100 North Carolina counties on July 13, and has a national Republican group — the Senate Leadership Fund — pledging more than $70 million to help him on top of his own campaign cash. That is why Republicans still sit at 9%: one July poll that shows a tighter race than other recent surveys, undecided Trump voters who could move to Whatley, and a lot of outside money still to spend before November.
Is 91% too high if one poll shows Cooper at 48% and Whatley at 44%? Not by itself. A poll lead is not a win probability. Other recent polls give Cooper a bigger lead: New York Times/Siena had him at 50% and Whatley at 43% on July 1, and a mid-July average of three polls on 270toWin sat near 49% for Cooper and 40% for Whatley. Add Cooper’s name-recognition edge and his own campaign’s cash lead — even with more than $70 million in outside Republican spending pledged for Whatley — and traders can price a Democratic win near 90% even when some headlines still look close.
North Carolina races often finish close. In that tighter July poll, undecided voters could still tip the race toward Whatley, and four months of ads are still ahead. Democrats remain the heavy favorite at 91%.
November 3, 2026: Election Day in North Carolina.