Rep. Markwayne Mullin (R-OK) on Tuesday evening advanced to Oklahoma’s Republican Senate primary runoff on August 23 to replace retiring Sen. Jim Inhofe (R-OK).
Mullin reached the runoff with about 45 percent of the vote, according to the New York Times. In second place is former Oklahoma House Speaker T.W. Shannon with 17 percent of the vote. Mullin needed to win 50 percent of the vote to avoid a runoff with Shannon, who is leading third-place finisher Nathan Dahm by about six percent or 17,000 votes.
The winner of the likely runoff will face off against Kendra Horn, who served in Congress from 2019 to 2021. Horn lost to Rep. Stephanie Bice (R-OK) in her reelection campaign in 2020 by about five percentage points or 13,000 votes. Horn had previously flipped a +11 red district to claim the seat in the 2018 midterms.
Mullin announced his campaign in February, giving up…