Sean Casten*
DEMOCRATIC
US House of Representatives (D-IL)
2019 – Present
Illinois6th District2026 HOUSE FORECAST
Niki Conforti
REPUBLICAN
Energy Consultant
2026 Illinois 6th District House Forecast:
Proprietary forecast for Illinois's 6th congressional district House election between Democrat Sean Casten and Republican Niki Conforti. This page will update with a daily set of 100,000 new simulations as race fundamentals change in order to produce race odds, projected margin, and forecasted vote share. This page also includes polling averages when available.
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 solid Democratic in 2026.
- Year
- 2026
- Race
- House
- District
- IL-6
- Democratic candidate
- Sean Casten
- Republican candidate
- Niki Conforti
- Incumbent / open seat
- Sean Casten
- Forecast rating
- Solid D
- Projected vote
- 57.6% D / 42.4% R
- Projected margin
- D +15.2
- Forecast odds
- 95.2% D / 4.8% R
- Forecast last updated
- 12:00 AM on July 2, 2026
- Polling average
- —
- Polling average margin
- —
- Polling last updated
- —
- Polls included
- 0
- Latest poll
- —