By Jim Ellis — Wednesday, March 25, 2026
Senate
Oklahoma’s Markwayne Mullin yesterday won Senate confirmation to his new position as Secretary of Homeland Security. A day before, Mullin resigned from the Senate thus creating a new open seat for the 2026 election cycle.
Mullin was first elected to the House in 2012 and was re-elected four times. He won a special election to the Senate in 2022 replacing then-Sen. Jim Inhofe (R) who resigned the seat for family reasons after serving 28 years. Immediately upon the Mullin confirmation, Oklahoma Gov. Kevin Stitt (R) appointed energy businessman Alan Armstrong (R) to serve the balance of the current term.Under Oklahoma procedure, when a Senate vacancy occurs the Governor appoints a replacement. The person agreeing to accept the appointment then signs an oath saying he or she will not seek election to the succeeding term. Therefore, Sen. Armstrong will only serve until just after the special election, which is scheduled concurrently with the regular election cycle.
Because the Mullin seat is in-cycle this year, the winner of the regular term — likely the person who wins the concurrent special election — will earn a full six-year term. The odds-on favorite to win both elections is Rep. Kevin Hern (R-Tulsa) who announced for the seat as soon as then-Sen. Mullin was designated as the new Homeland Security Secretary.
The Mullin resignation means there will be 11 open US Senate races in this cycle, seven from the Republican side as compared to four open Democratic seats.
Alan Armstrong was born and raised in the Bartlesville area of northern Oklahoma. He graduated from the University of Oklahoma and then went to work for the Williams energy company where he spent his professional career, rising to the company’s top position serving from 2011 to 2025. After retiring, he became a member of the Williams company Board of Directors from which he resigned to accept the short-term Senate appointment.
Oklahoma has a unique procedure for the appointment process that disqualifies the appointee from running for the seat to which they are chosen. While unconstitutional to pass a law that prohibits a citizen from seeking political office, the state lawmakers got around the requirement by having the appointment process include the signing of the oath pledging not to run.
If an individual decided to break the oath, it would be difficult for the state to pursue action against the person because of the individual’s constitutional right to participate in the political process. There is no indication in this case that Sen. Armstrong will attempt to break his oath.
Rep. Hern is cementing his case to become a consensus Senate candidate. After his formal announcement of candidacy, both Gov. Stitt, who had not expressed clear interest in running for the Senate, and Rep. Stephanie Bice (R-Oklahoma City) who confirmed she was contemplating entering the race, both announced they would not run.
In the Republican primary, the announced candidates challenging Rep. Hern are real estate broker Sean Buckner, IT professional Nick Hankins, nurse Ron Meinhardt, and non-profit CEO Wayne Washington.
For the Democrats, progressive activist Evan Beck, private investigator Troy Green, janitor Rebekah LaVann, retired attorney Jim Priest, and nurse N’Kiyla Thomas have declared their candidacies.
The Oklahoma candidate filing deadline is April 3, so time remains for a stronger contender in both parties to come forward. With no former or current elected official in the overall field, it appears that Rep. Hern is a lock to become the consensus Republican nominee and a prohibitive favorite for the general election.






