NBC News projects that Mazzei, a former state senator, narrowly defeated Oklahoma Attorney General Gentner Drummond in the Republican primary runoff.

Trump-backed Mike Mazzei finished the primary less than one percentage point behind Gentner Drummond, who has disagreed with Trump on tariffs.

Tulsa businessman Mike Mazzei is hoping to win a hotly contested Republican primary runoff for Oklahoma governor against state Attorney General Gentner Drummond.