Illinois 4th — House 2026 General Election
The Illinois 4th — House general election is on November 3, 2026. The model makes Democrat Patty Garcia the heavy favorite at 100%, with Republican Lupe Castillo at 0%. Patty Garcia is the incumbent, leads the field in reported fundraising, and has the most tracked endorsements. No public polling is available for this race, so the forecast leans on fundraising, endorsements, candidate profiles, and historical results.
Current win probabilities
- Patty Garcia (incumbent) — 100%
- Lupe Castillo — 0%
Probabilities update daily from polls, fundraising, endorsements, and historical results.