Mary Allen
DEMOCRATIC
Evansville City Council
2023 – Present
Indiana8th District2026 HOUSE FORECAST
Mark Messmer*
REPUBLICAN
US House of Representatives (R-IN)
2025 – Present
2026 Indiana 8th District House Forecast:
Proprietary forecast for Indiana's 8th congressional district House election between Democrat Mary Allen and Republican Mark Messmer. 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 Indiana 8th District House election features Democrat Mary Allen and Republican Mark Messmer. Incumbent Representative Mark Messmer is seeking reelection to a second term. In 2024, Donald Trump won Indiana's 8th congressional district by 16.5%, and the election for the district's House seat is rated as solid Republican in 2026.
- Year
- 2026
- Race
- House
- District
- IN-8
- Democratic candidate
- Mary Allen
- Republican candidate
- Mark Messmer
- Incumbent / open seat
- Mark Messmer
- Forecast rating
- Solid R
- Projected vote
- 29.9% D / 70.2% R
- Projected margin
- R +40.3
- Forecast odds
- 0.1% D / 99.9% R
- Forecast last updated
- 12:00 AM on July 2, 2026
- Polling average
- —
- Polling average margin
- —
- Polling last updated
- —
- Polls included
- 0
- Latest poll
- —