Mike Mazzei (R), a former state senator and financial planner, is projected to defeat Oklahoma Attorney General Gentner Drummond (R) in the Republican primary runoff for governor held on Wednesday, August 26, 2026. This result is seen as a win for former President Donald Trump, who endorsed Mazzei in the contest.

Both candidates were competing for the GOP nomination to run in the upcoming gubernatorial election. According to Decision Desk HQ, Mazzei's victory reflects the influence of Trump's backing within the Republican primary electorate in Oklahoma.

Mazzei’s win positions him as the Republican nominee for governor, setting the stage for the general election.

Sources