Illinois 62026 HOUSE POLLS

2026 Illinois 6th District House Forecast:

The Pollsmax 2026 Illinois 6th District House forecast currently gives Democrat Sean Casten a 94.6% chance of defeating Republican Niki Conforti. Pollsmax projects Casten to receive 57.6% of the vote compared with 42.5% for Conforti, a projected Democratic margin of 15.1 percentage points. The model currently rates the race as Likely Democratic. The forecast is updated using 100,000 simulations incorporating polling and race fundamentals. See the Pollsmax forecast methodology.

The 2026 Illinois 6th District House election features Democrat Sean Casten and Republican Niki Conforti. Incumbent Representative Sean Casten is seeking reelection to a fifth term. In 2024, Donald Trump won Illinois' 6th congressional district by 3.5%, and the election for the district's House seat is rated as likely Democratic in 2026.