On Tuesday, August 25, 2026, Oklahoma held a GOP runoff election to determine the Republican nominee for governor to succeed term-limited Gov. Kevin Stitt. The runoff featured Mike Mazzei, a former state senator and state budget secretary, against state Attorney General Gentner Drummond.

President Donald Trump has endorsed Mazzei and criticized Drummond, labeling him a "fake Republican". Trump’s opposition to Drummond centers on disagreements over party loyalty and policy positions.

The election results were closely watched as Trump sought to secure a primary win in Oklahoma’s governor race. The contest reflects broader dynamics within the Republican Party ahead of the general election.

Sources