U.S. Senator

Markwayne Mullin

Republican·OK — District 2· Former member

bioguide://M001190FEC S2OK00186

90%

Party loyalty

95%

Attendance

-1

Broke with party

Bills → law

Broke ranks.

Every vote where Mullin broke from the Republican majority. Crossover behavior is the clearest signal of independence — how we compute it.

Most recent defection · Mar 21, 2026

Voted NAY while Republicans voted YEA.

NAYvs Party: YEA

Jan 30, 2026
Consolidated Appropriations Act, 2026
Voted NAY while Republicans voted YEA
NAY
Jan 30, 2026
Consolidated Appropriations Act, 2026
Voted NAY while Republicans voted YEA
NAY
Jan 30, 2026
Consolidated Appropriations Act, 2026
Voted NAY while Republicans voted YEA
NAY
Jan 30, 2026
Consolidated Appropriations Act, 2026
Voted NAY while Republicans voted YEA
NAY
Jan 30, 2026
Consolidated Appropriations Act, 2026
Voted NAY while Republicans voted YEA
NAY
Jan 8, 2026
A joint resolution to direct the removal of United States Armed Forces from hostilities within or against Venezuela that have not been authorized by Congress.
Voted NAY while Republicans voted YEA
NAY
Jan 8, 2026
A joint resolution to direct the removal of United States Armed Forces from hostilities within or against Venezuela that have not been authorized by Congress.
Voted NAY while Republicans voted YEA
NAY

Last 10 roll-call votes.

Mar 23, 2026119-pn-786-9NV
Mar 23, 2026119-pn-858YEA
Mar 22, 2026119-pn-858YEA
Mar 21, 2026Veterans Accessibility Advisory Committee Act of 2025NAY
Mar 21, 2026YEA
Mar 20, 2026Further Additional Continuing Appropriations Act, 2026YEA
Mar 18, 2026A joint resolution to direct the removal of United States Armed Forces from hostilities within or against the Islamic Republic of Iran that have not been authorized by Congress.NAY
Mar 17, 2026Veterans Accessibility Advisory Committee Act of 2025YEA
Mar 17, 2026119-pn-787-4YEA
Mar 17, 2026119-pn-787-4YEA