President Trump faces a major test of his endorsement power in Tuesday’s Oklahoma Republican gubernatorial runoff, where his pick, former state senator and state budget secretary Mike Mazzei, narrowly trails Oklahoma Attorney General Gentner Drummond after both won roughly a quarter of the June primary vote. Drummond, a rancher, says Trump is wrong to support tariffs and temporarily lower barriers to ground beef imports, arguing the policy would hurt Oklahoma cattlemen, ranchers and farmers. The runoff is for the seat being vacated by term-limited Gov. Kevin Stitt, and the Republican nominee is considered highly likely to win in November. Trump has intensified attacks on Drummond, whose opposition to a planned Trump-backed aluminum smelter led to litigation, while Mazzei has promoted the project after previously criticizing it. Mazzei’s campaign paid nearly $70,000 to Trump confidante Roger Stone for consulting services, drawing scrutiny. Limited polling indicates a dead heat, while prediction markets favor Mazzei. The contest is among the final midterm gauges of Trump’s influence after five of his gubernatorial picks lost open Republican primaries this cycle.