House GOP Policy Committee Chairman Kevin Hern is jumping into the race for Oklahoma's open Senate seat, officially launching his campaign Wednesday as Sen. Markwayne Mullin prepares to leave the upper chamber and take the helm at the Department of Homeland Security.
Hern, who has represented Oklahoma in the House since 2018, wasted no time framing the stakes. His announcement landed with the kind of clarity Republican primary voters tend to reward.
"The American dream is under threat by the radical left and RINO Republicans who oppose President Trump's America First agenda and want to turn the United States into a third-world country."
"That's why I'm running for U.S. Senate — to ensure President Trump has a loyal ally, a leader who stood by his side when RINOs turned their backs on him, who will fight against Democrat insanity, keep the southern border secure, deport dangerous illegal immigrants, stand with law enforcement, and deliver economic affordability."
No ambiguity there. Hern is running as a Trump ally, and he clearly intends to make the primary a referendum on who carried the MAGA banner when it cost something to carry it.
The seat is opening because President Trump tapped Mullin to lead DHS following Kristi Noem's firing, Fox News reported. Trump has set a March 31 deadline for Mullin to take over and for Noem to exit. Mullin faces a confirmation hearing later this month and is set to begin his confirmation process in the upper chamber next week.
By all indications, the confirmation should move quickly. Mullin is expected to pass through the Senate Homeland Security and Governmental Affairs Committee without significant resistance, though whether he hits hurdles on the full floor remains an open question.
The broader message is unmistakable: Trump wants his people at DHS, and he wants them there now. A March 31 deadline is not a suggestion. It's a signal that border security and immigration enforcement remain central to this administration's agenda, and that personnel changes will be made swiftly when leadership falls short.
Here's where things get interesting for the Sooner State's political class. Traditionally, Senate vacancies are filled by the state's governor to serve out the remainder of the previous senator's term. But Oklahoma has a wrinkle that reshapes the calculus entirely: the governor's appointee must sign an affidavit swearing they will not run in the next election.
That means whoever Gov. Kevin Stitt appoints to fill the seat temporarily is, by design, a placeholder. The real prize goes to whoever wins the GOP primary and the November election to finish out Mullin's term, which ends at the end of 2026.
Senate Majority Leader John Thune is set to meet with Stitt this week to discuss the appointment, according to a source familiar with the discussions. Thune's public posture has been characteristically diplomatic. When asked about his preference, he offered none.
"You know, obviously we want — we're going to have to fill that seat for Markwayne here by the end of the month in the near term, and then the long-term issue will be decided by the voters of Oklahoma."
Translation: the Senate wants a warm body in the chair to maintain its numbers while Oklahoma sorts out its primary. The real fight is happening outside the Beltway.
Hern is not entering this race cold. He's already recruited pollster Tony Fabrizio as his campaign's senior advisor, a move that signals organizational seriousness from day one. Fabrizio said in a statement that Hern is in a "strong position" to win the seat, citing his "record of support for President Trump's agenda, the trust he has built with Oklahoma voters, and his experience in public service and in business."
The endorsement list is building quickly. Hern has already secured backing from at least four Republican senators:
That's not a random collection of names. Banks, Hagerty, Scott, and Johnson represent the populist-conservative wing of the Senate Republican conference. Their early support tells you exactly where Hern is positioning himself and who he expects to compete against for the MAGA vote.
Rep. Stephanie Bice, also a Republican from Oklahoma, has previously said she is considering her own campaign but has not made any final decisions. How crowded the GOP primary ultimately gets remains unclear.
Oklahoma is deep red. The general election is an afterthought. What matters is the Republican primary, and the dynamics of that primary will tell us something about where the conservative movement stands heading into the back half of Trump's second term.
Every candidate who enters will have to answer a straightforward question: Where were you when it mattered? Hern is betting his answer is strong enough to clear the field, or at least dominate it. His announcement language leaves zero daylight between himself and the Trump agenda. He's not running as a generic Republican who happens to support the president. He's running as someone who stayed loyal when loyalty was expensive.
In a primary where every candidate will claim the America First mantle, the winner will be whoever can prove they earned it. Hern has drawn first blood. Now, Oklahoma decides if he drew it deep enough.
