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Member brief · 119th Congress

Rep. Mark B. Messmer

R · Republican · U.S. Representative, Indiana 8th District1

In Congress
Since 2025 · 1 year
 Next election
Nov 3, 2026
 Committee leadership
None

CommitteesAgriculture; Armed Services; Education and Workforce2

Participation3

98 / 100

Chamber median 98
661 of 674 roll calls

Party unity3

99 / 100

Chamber median 98
on 467 party-line votes

Cross-party agreement3

13 / 100

Chamber median 12
on 522 contested votes

Ideology score4

+0.54

Chamber median +0.19
−1 left · +1 right

Notable votes and votes by issue

In the full brief: five notable recent votes chosen by a fixed rule (most recent breaks with party first), each with the member’s vote, the party’s position and a source, plus how often Messmer votes with the party on each issue.

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Votes most like5

R Mike Johnson LA-4 100% of 429
R Matt Van Epps TN-7 99% of 293
R Dan Crenshaw TX-2 99% of 479

Share of roll calls both voted on where they voted the same way.

Next race

Nov 3, 2026 · Filed for re-election6

Others filed for this seat

Mary Theresa AllenDemocratic Party

Data as of Oct 4, 2026 · votes through Sep 16, 2026 · Method: https://oathstar.com/methodology · Live profile: https://oathstar.com/member/mark-b-messmer

  1. 1. Member record and terms: congress.gov; unitedstates/congress-legislators, retrieved 2026-10-04. www.congress.gov/member/M001233
  2. 2. Committees: unitedstates/congress-legislators, retrieved 2026-10-04. github.com/unitedstates/congress-legislators
  3. 3. Participation, party unity, cross-party agreement, votes by issue: Oathstar from Voteview roll calls, 119th Congress, retrieved 2026-10-04. voteview.com/person/22540
  4. 4. Ideology: DW-NOMINATE first dimension, Voteview, 119th Congress. voteview.com/person/22540
  5. 5. Votes most like: Oathstar from Voteview roll calls, 119th Congress. voteview.com/data
  6. 6. Candidates: FEC filings, 2026 IN-8 race, retrieved 2026-10-05. www.fec.gov/data/elections/house/IN/08/2026/

Prepared with Oathstar · oathstar.com

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