Daniel Biss
DEMOCRATIC
Mayor of Evanston
2021 – Present
Illinois9th District2026 HOUSE FORECAST
John Elleson
REPUBLICAN
Pastor
2026 Illinois 9th District House Forecast:
Proprietary forecast for Illinois's 9th congressional district House election between Democrat Daniel Biss and Republican John Elleson. 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 9th District House election features Democrat Daniel Biss and Republican John Elleson. The seat is open in 2026, but the race to fill it is not expected to be competitive. In 2024, Kamala Harris won Illinois' 9th congressional district by 16.5%, and the election for the district's House seat is rated as solid Democratic in 2026.
- Year
- 2026
- Race
- House
- District
- IL-9
- Democratic candidate
- Daniel Biss
- Republican candidate
- John Elleson
- Incumbent / open seat
- Open seat
- Forecast rating
- Solid D
- Projected vote
- 69.8% D / 30.2% R
- Projected margin
- D +39.6
- Forecast odds
- 99.9% D / 0.1% R
- Forecast last updated
- 12:00 AM on July 2, 2026
- Polling average
- —
- Polling average margin
- —
- Polling last updated
- —
- Polls included
- 0
- Latest poll
- —