2026 House Race Tightens: Democrats slip 5¢, Republicans gain 3¢
Democratic odds to win the House fell 5¢ to 78¢ on Polymarket, while Republican odds rose 3¢ to 22¢ on Kalshi. The shift was driven by new polling showing improved Republican performance in swing districts. The generic ballot vote share is also tightening.
Cross-market probability snapshot
Will Republicans win the House in 2026?: Republican Party
23¢Will Republicans win the U.S. Senate in 2026?: Republican Party
53¢Each row is a contract priced as a YES probability. Bars are tinted emerald in the >50% band, zinc otherwise. Hover or open in /markets for live orderbook data.
Key takeaways
- 01
Democratic odds to win the House fell 5¢ to 78¢ on Polymarket, while Republican odds rose 3¢ to 22¢ on Kalshi.
- 02
The shift was driven by new polling showing improved Republican performance in swing districts.
- 03
The generic ballot vote share is also tightening.
Full analysis
The battle for control of the House of Representatives in the 2026 midterms is heating up. The 'Which party will win the House in 2026?: Democratic Party' contract (P | 0xd5d9fc47718bd55359) dropped 5¢ to 78¢, while the Republican Party version (P | 0x4e4f77e7dbf4cab666) climbed 3¢ to 22¢. On Kalshi, the 'Will Democrats win the House in 2026?' (CONTROLH-2026-D) is at 74¢ (down from previous), and 'Will Republicans win the House in 2026?' (CONTROLH-2026-R) is at 26¢ (up 1¢). The catalyst is a series of fresh district-level polls from competitive seats in Michigan, Ohio, and New York, which show the Republican base more energized than expected. The 'Balance of Power' markets reflect these changes: 'Democrats Sweep' (P | 0x16c63b7cc37f012b9f) fell 8¢ to 40¢, while 'Republicans Sweep' (P | 0xc5eae79d1ffe716572) rose 3¢ to 22¢. The Senate control market remains tighter: Republicans are at 56¢ on Kalshi (CONTROLS-2026-R) and Democrats at 43¢ (CONTROLS-2026-D). Key individual races to watch include the California Governor primary (K | KXGOVCA-26-KHAR at 0¢ vs K | KXGOVCA-26-TSTE at 32¢ vs K | KXGOVCA-26-XBEC at 47¢) and the LA Mayoral race where Spencer Pratt has surged. Traders should monitor the 'Generic ballot vote share' contracts (K | KXGENERICBALLOTVOTEH) which are above 5.8% for Democrats. The midterm election environment is fluid and the next round of fundraising reports expected in June could further move these markets.
Related markets
Source markets at a glance
The contracts behind this dispatch — current price + 24h volume. Click any card for live orderbook data.
Zoom out
sf query "house control" && sf book CONTROLH-2026-D