Illinois 12th — House 2026 Rep Primary
The Illinois 12th — House rep primary is scheduled for March 17, 2026. Mike Bost is running unopposed. Mike Bost is the incumbent. No public polling is available for this race, so the forecast leans on fundraising, endorsements, candidate profiles, and historical results.
Current win probabilities
- Mike Bost (incumbent) — 100%
Probabilities update daily from polls, fundraising, endorsements, and historical results.