Rep. Kevin Hern has won the Republican Senate primary in Oklahoma, NBC News projects, paving the way for him to win the open seat in the general election.

The seat was previously represented by Department of Homeland Security Secretary Markwayne Mullin, who resigned from the Senate in March to replace former Secretary Kristi Noem in the Cabinet.

Hern, who was first elected to the House in 2018, decided to leave that chamber to attempt the leap to the Senate. Hern currently represents Oklahoma’s 1st Congressional District, which covers most of Tulsa, and serves on the powerful House Ways and Means Committee.

Before his time in Congress, he was a McDonald’s restaurant franchisee. Sen. Alan Armstrong was appointed to fill the Senate seat for the remainder of Mullin’s term, before the fall election.

President Donald Trump endorsed Hern in a Truth Social post in March, in which Trump described Oklahoma’s GOP candidate as “a Great Patriot” and a “true friend of MAGA,” adding that Hern “is doing a tremendous job advancing our AMERICA FIRST Agenda.”

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Tagged: 2026 Midterms BACK TO HOMEPAGE