Lauren Underwood*
DEMOCRATIC
US House of Representatives (D-IL)
2019 – Present
Illinois14th District2026 HOUSE FORECAST
James Marter
REPUBLICAN
Oswego Public Library Board
2026 Illinois 14th District House Forecast:
Proprietary forecast for Illinois's 14th congressional district House election between Democrat Lauren Underwood and Republican James Marter. 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 14th District House election features Democrat Lauren Underwood and Republican James Marter. Incumbent Representative Lauren Underwood is seeking reelection to a fifth term. In 2024, Donald Trump won Illinois' 14th congressional district by 6.5%, and the election for the district's House seat is rated as likely Democratic in 2026.
- Year
- 2026
- Race
- House
- District
- IL-14
- Democratic candidate
- Lauren Underwood
- Republican candidate
- James Marter
- Incumbent / open seat
- Lauren Underwood
- Forecast rating
- Likely D
- Projected vote
- 57.5% D / 42.5% R
- Projected margin
- D +15.0
- Forecast odds
- 94.9% D / 5.1% R
- Forecast last updated
- 12:00 AM on July 2, 2026
- Polling average
- —
- Polling average margin
- —
- Polling last updated
- —
- Polls included
- 0
- Latest poll
- —