Markwayne Mullin’s confirmation hearing: what it means for Oklahoma and Senate race

WASHINGTON, D.C. (KOKH) — Oklahoma Sen. Markwayne Mullin faced lawmakers Wednesday in a high-stakes confirmation hearing to become the next Secretary of Homeland Security, a move that could dramatically reshape Oklahoma’s political landscape ahead of the 2026 election.

Mullin, a Republican first elected to the Senate in 2022, appeared before the Senate Homeland Security and Governmental Affairs Committee as President Donald Trump’s nominee to replace outgoing DHS Secretary Kristi Noem.

The hearing marks a pivotal moment not only for national security leadership but also for Oklahoma politics, where Mullin’s potential departure from the Senate would trigger a chain reaction in an already active election cycle.

If confirmed by the full Senate, Mullin would be required to resign his Senate seat under the Constitution’s prohibition on holding both legislative and executive offices simultaneously.

A Contentious Confirmation

Mullin entered Wednesday’s hearing with strong backing from Republicans and at least limited bipartisan openness. While most Democrats have expressed skepticism, Sen. John Fetterman (D-Pa.) has publicly supported the nomination, highlighting Mullin’s alignment on border security issues.

Mullin was introduced in the confirmation hearing by fellow Oklahoma Senator James Lankford in a sentimental moment where Sen. Lankford reflected on their first meeting.

Mullin, however, was grilled by fellow Republican and Committee Chairman Sen. Rand Paul (R-Kentucky) during the hearing, especially on the topic of violence.

Mullin was also questioned by Sen. Andy Kim (D-New Jersey) about FEMA and disaster responses, pressing Mullin on whether he wanted to do away with FEMA entirely like Noem had previously hinted.

Mullin responded, saying he believes FEMA should be reformed, not dissolved entirely.

WATCH THE FULL CONFIRMATION HEARING HERE:

What Happens to Mullin’s Senate Seat?

Mullin’s confirmation would immediately create a vacancy in Oklahoma’s U.S. Senate delegation and place significant power in the hands of Gov. Kevin Stitt.

Under Oklahoma law, the governor would appoint a temporary replacement to serve until voters select a new senator in the November general election.

However, that appointee would face a major limitation: they would be barred from running in the upcoming election, a rule designed to prevent incumbency advantages.

The appointment would be short-lived regardless. Because the seat is already scheduled to be on the ballot in 2026, the November winner would quickly replace the interim senator and serve the remainder of the term.

A Senate Race Already Taking Shape

Even before Mullin’s confirmation is finalized, the race to succeed him is beginning to take shape.

Oklahoma Rep. Kevin Hern has already launched a campaign for the seat, signaling what is expected to be a competitive Republican primary.

On the Democratic side, several candidates have entered the race, though Republicans remain heavily favored in the deeply conservative state.

The filing period for candidates begins April 1, meaning the political field could solidify quickly following any Senate confirmation vote.

Who Might the Governor Appoint?

Governor Stitt has not indicated a specific choice for a temporary replacement, but he has signaled he will prioritize a “strong, small-government conservative.”

There are also notable constraints shaping his decision. Reports indicate Stitt may avoid appointing current members of Oklahoma’s congressional delegation, and some high-profile state leaders have already said they would decline the role if offered.

Because the appointee cannot run in November, the position is likely to go to a trusted Republican figure willing to serve briefly rather than a rising political candidate.