Illinois 122026 HOUSE POLLS
2026 Illinois 12th District House Forecast:
The Pollsmax 2026 Illinois 12th District House forecast currently gives Republican Mike Bost a 99.9% chance of defeating Democrat Julie Fortier. Pollsmax projects Bost to receive 73.4% of the vote compared with 26.6% for Fortier, a projected Republican margin of 46.8 percentage points. The model currently rates the race as Solid Republican. The forecast is updated using 100,000 simulations incorporating polling and race fundamentals. See the Pollsmax forecast methodology.
The 2026 Illinois 12th District House election features Democrat Julie Fortier and Republican Mike Bost. Incumbent Representative Mike Bost is seeking reelection to a seventh term. In 2024, Donald Trump won Illinois' 12th congressional district by 6.5%, and the election for the district's House seat is rated as solid Republican in 2026.
- Year
- 2026
- Race
- House
- District
- IL-12
- Democratic candidate
- Julie Fortier
- Republican candidate
- Mike Bost
- Incumbent / open seat
- Mike Bost
- Forecast rating
- Solid R
- Projected vote
- 26.6% D / 73.4% R
- Projected margin
- R +46.8
- Forecast odds
- 0.1% D / 99.9% R
- Forecast last updated
- 12:00 AM on September 30, 2026
- Polling average
- —
- Polling average margin
- —
- Polling last updated
- —
- Polls included
- 0
- Latest poll
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