The Mike Mazzei drug test came back negative, but Gentner Drummond's campaign is challenging the type of test as Oklahoma's GOP runoff approaches.

The Jake Merrick endorsement gives Mike Mazzei another prominent supporter ahead of Oklahoma's Aug. 25 Republican gubernatorial runoff.

A new Oklahoma governor race poll shows Gentner Drummond and Mike Mazzei tied at 44% as Republicans prepare for the Aug. 25 runoff election.