Member brief No. IN-08
Reviewed October 31, 2026
IN-08 · Indiana
Mark B. Messmer
Republican. Trump won Indiana in 2024. Not flagged for 2032 redistricting risk.
- Age on Election Day 2028
- 66
- Born September 21, 1962.
- Lean
- R+18
- Solidly Republican. Cook PVI, 2026 lines.
- In the House since
- 2025
- Served since January 3, 2025.
- Cash on hand
- $551K
- $550,906. Reporting period ended October 14, 2026
The 2026 race
- November 3, 2026
- Re-elected
Over Mary Allen (D). Called by NBC News on November 4, 2026.
- Primary
- Unopposed
The only name on the ballot, May 5.
Endorsements, 2026
Endorsed: Donald Trump.
None on record: Club for Growth, Turning Point Action, MAHA PAC.
What a race here costs
TV: Evansville, 291,000 homes. The district is 53.8% of the market; 4 markets in all.
2026 primary: $409K spent, $7.83 a vote
2024 general: $284K spent, $0.88 a vote
In the House, 119th Congress
Committees: Agriculture · Armed Services · Education and Workforce
General-election outcomes
- 2024 vote share
- 67.96%
- Victory margin
- +38.51 pts
- Trump, 2024
- 67.10% · +35.88 pts
Margin 2.63 points above Trump. Vote share 0.86 points above.
2024 election districts. Valid votes; margin over the runner-up. Runner-up: Erik Hurt. Returns · Trump baseline · Method. Reviewed November 5, 2026.
Money, past cycles
| Cycle | Raised | From individuals | Cash at year end |
|---|---|---|---|
| 2024 | $1.5M | 65% | $207K |
Scorecards and grades
- Conservative average, out of 100
- 86.4
- Progressive average, out of 100
- 10.3 (LCV 0, Progressive Punch 1, Stop Corruption Now 30)
- IAP Action score, immigration
- 121, rank 75 of 431
- Gun Owners of America grade, 2024
- NR
Read October 31, 2026 from the member’s page on heritageaction.com, clubforgrowth.org, tpaction.com, gopscorecard.limitedgov.org.