Predict.fun Put Democratic Sweep Odds at 99% After North Carolina Flip

Predict.fun put the chance of a Democratic sweep of Congress at 99% late Tuesday after former North Carolina Gov. Roy Cooper flipped an open Senate seat, as election-night traders favored one outcome for both chambers.

The figure covered Democratic control of both the House and Senate. It reflected trading while votes were being counted, not an election result.

Cooper defeated Republican Michael Whatley for the seat Republican Sen. Thom Tillis is vacating. It was the first Senate seat to shift from Republican to Democratic control that night. Democratic Sen. Jon Ossoff also won reelection in Georgia, keeping a seat his party already held.

Republicans held 53 Senate seats before the election, while Democrats and two independents who caucus with them held 47. Democrats needed a net gain of four seats to reach 51; Vice President JD Vance would break a 50-50 tie. At the time of Cooper’s victory, they still needed three net gains.

The 99% figure captures an earlier point in election-night trading while votes were being counted.