IA-04 House 2026

The chance this seat goes Republican in November, across every listed contract, as a 0–100 chance the Republican wins.

LiveHeld by Republicans · projected hold·$86 traded / 24h·12 contracts·4 exchanges·Margin rank 324 of 435
SEAT PMI · 0–100 · CHANCE REPUBLICANS WIN
97.3Safe R · ▲ 0.8 14d
DEMOCRATEVENREPUBLICAN
Republicans win
97.3
enters as 97.3
Democrats win
2.8
enters as 100 − 2.8 = 97.3

Both legs are aggregated. The Democratic leg is converted as 100 − p, so this seat reads on the same scale as every other.

Control of the House

Does IA-04 decide the House?

No. It is rated Safe R, outside the 39 contested seats.
Democrats already have 224 seats rated safe or likely, 6 past the 218 majority; Republicans have 172 rated safe or likely, 46 short of 218.
Full House picture
Contracts behind this reading · 6 of 12

Sorted by weight

Will Democratic win the House race for IA-04? - Dave Dawson2.7Kalshi ↗ · Democratic leg · enters as 97.3weight 100.0%IA-04 General Election — Dave Dawson6.0IBKR ↗ · Republican leg · enters as 6.0weight 0.0%IA-04 General Election — Chris McGowan92.0IBKR ↗ · Republican leg · enters as 92.0weight 0.0%IA-04 General Election — Matt Windschitl50.0IBKR ↗ · Republican leg · enters as 50.0weight 0.0%IA-04 General Election — Ryan Rhodes50.0IBKR ↗ · Republican leg · enters as 50.0weight 0.0%Will Dave Dawson win the Iowa 4th District general election for the US House of Representatives in 2026?6.0ForecastEx ↗ · Republican leg · enters as 6.0weight 0.0%
Show all 12 contracts
Weights are 24h liquidity share · reconciled reading 97.3 · rows open on the exchange
Other Iowa races this cycle

Also on the ballot