U.S. Rep. Tom Tiffany holds a commanding lead in the Republican primary for Wisconsin governor, driven by his January endorsement from President Donald Trump and the state party’s official backing at its May 16 convention, where he was the only candidate to qualify. This consolidation has prompted withdrawals by other contenders, including Josh Schoemann, and recent support from former Gov. Tommy Thompson, reinforcing Tiffany’s position ahead of the August 11 primary. Traders reflect this momentum through heavy positioning on Tiffany, while lower-probability outcomes for remaining candidates like Andy Manske hinge on limited name recognition and weaker institutional ties. Potential shifts could arise from unforeseen late developments within the primary window, though current polling averages and party alignment suggest strong barriers to significant movement.