The Republican primary for Michigan governor remains closely contested between Perry Johnson and John James, with limited public polling showing the two frontrunners nearly even amid high undecided shares. Both cleared recent nominating petition challenges in late May, securing ballot access alongside Mike Cox and Aric Nesbitt after signature disputes were resolved by state canvassers. Endorsements, including from former candidate Tom Leonard, and ongoing campaign efforts on issues like the economy and state governance continue to shape dynamics ahead of the August 4 primary. Additional polling releases or late endorsements could shift momentum in this open race for the nomination.