Oklahoma voters are heading to the polls Tuesday for the state’s gubernatorial Republican primary runoff, as President Donald Trump-backed Mike Mazzei takes on Attorney General Gentner Drummond, who has spoken out against the president’s tariff agenda.

Mazzei finished less than 1 percentage point behind Drummond in the June primary as both candidates seek to succeed Gov. Kevin Stitt (R-OK), who is term-limited. Stitt has endorsed Mazzei in the runoff, but endorsements seem to carry little weight as polls show the two candidates in a dead heat.