2026 Indiana · U.S. House
IN-08 House race odds
As of Oct 2, 2026, prediction markets give Republican Mark Messmer a 96% chance of winning the 2026 race for IN-08 over Democrat Mary Allen (Kalshi 95%, Polymarket 97%).
Updated · prices refresh every 10 minutes
- Market rating
- Safe R
- Kalshi (D / R)
- 4.6% / 95.4%
- Polymarket (D / R)
- 3.3% / 96.7%
- Gap between exchanges
- 1.3 pts
- Election Day
- Nov 3, 2026 (32 days)
Price history
Democratic odds are essentially unchanged since Oct 2, 2026.
Every candidate, by exchange
Each exchange's prices rescaled to add up to 100%. Kalshi prices are the bid–ask midpoint; Polymarket prices are its displayed price.
Kalshi open market ↗
| Outcome | Chance | Volume |
|---|---|---|
| Mark Messmer (R) | 95.4% | $2K |
| Mary Allen (D) | 4.6% | $4K |
Polymarket open market ↗
| Outcome | Chance | Volume |
|---|---|---|
| Mark Messmer (R) | 96.7% | $27K |
| Mary Allen (D) | 3.3% | $16K |
Questions about this race
Who is favored to win the 2026 IN-08 House race?
As of Oct 2, 2026, prediction markets give Republican Mark Messmer a 96% chance of winning the 2026 race for IN-08 over Democrat Mary Allen (Kalshi 95%, Polymarket 97%).
What do Kalshi and Polymarket say?
Kalshi: Democrats 5%, Republicans 95%. Polymarket: Democrats 3%, Republicans 97%. The two exchanges differ by 1.3 points.
How have the odds moved this week?
Democratic odds are essentially unchanged since Oct 2, 2026.
When is the 2026 election?
Election Day is Nov 3, 2026, 32 days from now.
Other Indiana races in 2026
- IN-01 HouseD 99%
- IN-02 HouseR 97%
- IN-03 HouseR 95%
- IN-04 HouseR 95%
- IN-05 HouseR 85%
- IN-06 HouseR 95%
- IN-07 HouseD 99%
- IN-09 HouseR 94%
Closest House races in 2026
Data
Price history (JSON)All 2026 races (JSON)All 2026 races (CSV)2026 dashboardMethodology
Cite as: Parlay the People, “2026 IN-08 House race,” https://parlaythepeople.com/2026/house/in-8/, accessed Oct 2, 2026. Prediction-market prices are crowd forecasts, not certainties, and nothing here is betting or investment advice.