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Sen. Markwayne Mullin

Senator for Oklahoma

pronounced MAHR-kwayn // MUH-lin

Mullin is the junior senator from Oklahoma and is a Republican. He has served since Jan 3, 2023. Mullin is next up for reelection in 2026 and serves until Jan 3, 2027. He is 46 years old.

He was previously the representative for Oklahoma’s 2nd congressional district as a Republican from 2013 to 2022.

Photo of Sen. Markwayne Mullin [R-OK]
Elections must be decided by counting votes

Our work to hold Congress accountable only matters if elections are decided by counting votes. President Trump, his advisors and associates, and Republican legislators collaborated to have the 2020 presidential election decided by themselves rather than by voters through their attempts to suppress state-certified election results at both the state and national level.

Mullin was among the Republican legislators who participated in this. Shortly after the election, Mullin joined a case before the Supreme Court calling for all the votes for president in Georgia, Michigan, Pennsylvania, and Wisconsin — states that were narrowly won by Democrats — to be discarded, in order to change the outcome of the election. In the case, Republicans proffered lies and a novel legal theory which the Supreme Court rejected. (Following the rejection of several related cases before the Supreme Court, another legislator who joined the case called for violence.) On January 6, 2021 in the hours after the violent insurrection at the Capitol, Mullin voted to omit Arizona and/or Pennsylvania from the counting of presidential electors, which could have altered the outcome of the election in Trump’s favor.
In 2023, Trump associates and top advisors pleaded guilty to submitting a fraudulent slate of electors to Congress from Georgia, making false statements about purported widespread fraud in the election, and tampering with voting machines after the election, admitted in civil court to posing as fake electors in Wisconsin, and were convicted of contempt of Congress for withholding documents during its investigation and assaulting police officers at the Capitol. Trump associates and top advisors are also facing charges for submitting fraudulent slates of electors to Congress (in Michigan, Nevada, Arizona, and Wisconsin) and Trump himself faces criminal charges for coordinating the fraudulent slates of electors and other actions. He was also convicted in 2024 of falsifying business records to cover up acts that he believed might have hurt him in the 2016 election. The January 6, 2021 violent insurrection at the Capitol, led on the front lines by militant white supremacy groups one member of which was convicted of sedition, attempted to prevent President-elect Joe Biden from taking office by disrupting Congress’s count of electors.

Committee Membership

Markwayne Mullin sits on the following committees:

Enacted Legislation

Mullin was the primary sponsor of 10 bills that were enacted. The most recent include:

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Does 10 not sound like a lot? Very few bills are ever enacted — most legislators sponsor only a handful that are signed into law. But there are other legislative activities that we don’t track that are also important, including offering amendments, committee work and oversight of the other branches, and constituent services.

We consider a bill enacted if one of the following is true: a) it is enacted itself, b) it has a companion bill in the other chamber (as identified by Congress) which was enacted, or c) if at least about half of its provisions were incorporated into bills that were enacted (as determined by an automated text analysis, applicable beginning with bills in the 110th Congress).

Bills Sponsored

Issue Areas

Mullin sponsors bills primarily in these issue areas:

Health (28%) Native Americans (26%) Science, Technology, Communications (13%) Energy (13%) Commerce (8%) Crime and Law Enforcement (8%) Environmental Protection (5%)

Recently Introduced Bills

Mullin recently introduced the following legislation:

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Most legislation has no activity after being introduced.

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Voting Record

Key Votes

Mullin voted Yea

Mullin voted Nay

Passed 369/42 on Jun 13, 2022.

Mullin voted Nay

Passed 327/85 on Dec 21, 2020.
This bill became the vehicle for passage of the Consolidated Appropriations Act, 2021, a major government funding bill, which also included economic stimulus provisions due …

Mullin voted Nay

Passed 361/61 on Sep 26, 2018.
H.R. 6157 provides $674.6 billion in total discretionary budget authority for the Department of Defense for fiscal year (FY) 2019. The bill provides $606.5 billion …

Mullin voted Yea

Passed 338/88 on May 13, 2015.
The USA Freedom Act (H.R. 2048, Pub.L. 114–23) is a U.S. law enacted on June 2, 2015 that restored in modified form several provisions of …

Mullin voted Yea

Passed 219/206 on Dec 11, 2014.
This bill became the vehicle for passage of the Consolidated and Further Continuing Appropriations Act, 2015 [pdf], which was approved by the House on December …

Mullin voted Aye

Mullin voted Nay

Mullin voted Nay

Passed 388/18 on Jan 8, 2014.

Mullin voted No

Passed 285/144 on Jan 23, 2013.

Missed Votes

From Feb 2023 to Jul 2024, Mullin missed 37 of 554 roll call votes, which is 6.7%. This is much worse than the median of 2.9% among the lifetime records of senators currently serving. The chart below reports missed votes over time.

We don’t track why legislators miss votes, but it’s often due to medical absenses, major life events, and running for higher office.

Show the numbers...

Primary Sources

The information on this page is originally sourced from a variety of materials, including: