Gentner Drummond holds the lead in the Republican primary for Oklahoma governor, scheduled for June 16, 2026, reflecting his early campaign launch as the state's attorney general, established name recognition, and consistent polling advantage over the field. Chip Keating and Charles McCall follow as the main challengers, drawing support from their prior roles in public safety and legislative leadership, respectively, while Mike Mazzei competes closely on the strength of his business background and state Senate experience. Recent candidate forums and media interviews in May have sharpened contrasts on issues such as border security, education policy, and economic growth, helping maintain the current spread among the top contenders. Lower-polling candidates like Matt Pinnell and Ryan Walters trail due to later entries and limited visibility ahead of the open primary, where voter turnout among Republican-leaning blocs will determine whether a runoff occurs.