VotePredictor
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Illinois District 12 election, 2026

Julie Fortier vs. Mike Bost.

VotePredictor forecast
Mike Bost favored
Safe R · predicted margin R+43.8
100%
chance to win
2024 presidential lean
R+43.0
2026 national environment
D+6.3
Model uncertainty
±6.9 points

Fundamentals model using district presidential lean, incumbency and the national environment. It is not a poll average.

Democratic

Julie Fortier

Major-party general-election nominee.

Polls

No district-level 2026 general-election poll is currently in VotePredictor's verified polling feed for IL-12. The forecast above uses fundamentals only.

Other forecasts

We have not yet ingested a district rating from these independent forecasters for IL-12; links go to their current national House ratings. Missing is shown as missing—not converted into a probability.

Past results

Every election in Illinois's 12th district we hold a result for. District numbers are reused across redistricting, so older rows may cover different ground than the seat does today.

YearWinnerMargin
2014Mike Bost(R)R+10.6

Candidate news

Candidate field source: 2026 House election roster ↗

Nearby in the directory: IL-11 · IL-13