Election Day 2026 has arrived, and prediction markets have spent the final week repricing almost everything on the ballot. As polls open across the eastern seaboard this morning, the aggregate picture across Kalshi, Polymarket, and PredictIt points to one of the tightest midterm nights in a generation. Senate control is trading inside a five-point band, the House is a coin flip in dollar terms, and three governors’ races are pricing at better than 40% for each major party. Below is where the biggest contracts closed overnight and what to watch as results roll in.
Senate Control: Republicans Favored, But Narrowly
The headline Senate contract on Kalshi (“Which party will control the Senate after the 2026 midterms?”) closed at 58% Republican, 42% Democratic as of 6:00 a.m. ET, essentially flat from Friday’s close. Polymarket’s mirror contract is trading at 57/43, with the spread tight enough that roughly $3.2 million in two-way volume cleared in the last 24 hours alone.
The decisive races, per market-implied odds, are the usual suspects: Georgia, Pennsylvania, Ohio, and Nevada. Markets have the following closing probabilities for Democratic holds or pickups:
- Georgia Senate (Ossoff re-elect): 51% Democratic hold
- Pennsylvania Senate: 46% Democratic
- Ohio Senate: 34% Democratic
- Nevada Senate: 55% Democratic hold
- Michigan Senate: 61% Democratic hold
- Arizona Senate: 48% Democratic
If you aggregate the independent contract prices, Democrats need to win five of the six to have better than even odds of control. That’s a steep ask when only two of the six are currently trading above 50%. The modal market outcome, per Polymarket’s distributional contract, is a 52-48 Republican Senate.
House Control: A Genuine Coin Flip
The House is where the smart money is still undecided. Kalshi’s “Which party wins the House majority in 2026?” contract closed at 51% Democratic, 49% Republican, the tightest the spread has been since the generic ballot flipped in September. Polymarket is a point tighter at 50/50 even.
Three generic-ballot signals matter here. First, the final RealClearPolitics average has Democrats +1.4, which historically translates to a four-to-six-seat Democratic gain. Second, markets are pricing redistricting changes in New York and North Carolina to roughly offset. Third, the over/under on total House seats won by Democrats is set at 218.5 on the few sportsbook-style contracts offering it, basically the exact threshold for a majority.
Watch three bellwether contracts tonight: NY-17, PA-07, and IA-03. Each is trading between 45% and 55% and each has historically called the House majority correctly in the last three cycles.
Governors: Three Toss-Ups, Two Surprise Movers
Gubernatorial markets are where you’ll find the night’s biggest unhedged positions. The three closest races, by market-implied margin:
- Pennsylvania Governor: 52% Democratic hold, down from 61% two weeks ago
- Georgia Governor (open seat): 54% Republican, essentially unchanged
- Arizona Governor: 49% Democratic, 51% Republican
The surprise movers: Ohio has quietly become competitive, with the Democratic nominee rising from 18% two months ago to 31% this morning, and New Hampshire has gone the other way, with the Republican challenger pricing in at 44% after sitting below 30% through October. Neither is likely to flip, but both are now live enough that any late surge could add governing power on the margin.
What the Overnight Volume Is Telling Us
The clearest market signal of the last 48 hours is not a single race, it is the shape of the volume. Kalshi reported $18.4 million in Senate-related contract volume in the final week, with 75% of new money going to the Democratic side. That’s a classic late-cycle contrarian signal: either a wave is building that polling missed, or disciplined bettors are taking slightly-off prices on a Democratic recovery. We will know by midnight which read was correct.
Polymarket’s whale tracker, meanwhile, flagged three positions above $500,000 in the last 36 hours, all on the Republican side of the House contract. That’s the opposite signal. Combined, the picture is a market that genuinely does not know, with sharp money on both sides convinced the other is mispricing the night.
Where to Trade Tonight
If you want to put real capital on tonight’s outcomes, there are three live venues worth your attention. Kalshi remains the only CFTC-regulated US venue offering control contracts and individual race markets, with full dollar-settled payouts and no offshore counterparty risk. Polymarket offers deeper per-contract liquidity on the biggest races and the only credible House seat-count distribution market, though it requires a crypto on-ramp. PredictIt is still live for grandfathered election contracts but with $850 position limits that make it more a signal than a profit center.
For a side-by-side of fees, settlement rules, and tonight’s liquidity, see our full best prediction markets rankings. Results will update this page in real time starting at 7 p.m. ET.