Idaho Senate 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·$34K traded / 24h·11 contracts·6 exchanges·Margin rank 26 of 35
SEAT PMI · 0–100 · CHANCE REPUBLICANS WIN
97.8Safe R · ▲ 0.2 14d
DEMOCRATEVENREPUBLICAN
Republicans win
97.8
enters as 97.8
Democrats win
2.3
enters as 100 − 2.3 = 97.8

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 Senate

Does Idaho decide the Senate?

No. It is rated Safe R, outside the 7 contested seats.
Control turns on the 7 contested seats. The seat that tips control is Texas at 34.2.
Full Senate picture
Contracts behind this reading · 6 of 11

Sorted by weight

Will Republicans win the Senate race in Idaho? - Jim Risch95.3Kalshi ↗ · Republican leg · enters as 95.3weight 79.1%Will Democratics win the Senate race in Idaho? - David Roth0.1Kalshi ↗ · Democratic leg · enters as 99.9weight 17.3%Will the Republicans win the Idaho Senate race in 2026?95.7Polymarket ↗ · Republican leg · enters as 95.7weight 3.5%Idaho Senate General Election — David Roth3.0IBKR ↗ · Republican leg · enters as 3.0weight 0.0%Idaho Senate General Election — Jim Risch93.0IBKR ↗ · Republican leg · enters as 93.0weight 0.0%Idaho US Senate Winner - David Roth2.0Gemini ↗ · Republican leg · enters as 2.0weight 0.0%
Show all 11 contracts
Weights are 24h liquidity share · reconciled reading 97.8 · rows open on the exchange
Other Idaho races this cycle

Also on the ballot