Andy Biggs holds a commanding position in Arizona’s Republican primary for governor, set for July 21, due to President Trump’s endorsement, Karrin Taylor Robson’s February withdrawal that consolidated conservative support, and consistent polling leads of 20 points or more over David Schweikert among likely voters. Biggs has also maintained a substantial fundraising edge and filed over 20,000 nomination signatures by March. Trader consensus at 94.5% implied probability reflects these structural advantages ahead of early voting. Schweikert’s 3.4% share aligns with his focus on moderate and business-oriented voters through attacks on Biggs, though party officials have condemned recent accusations. Late developments such as undecided consolidation, a major scandal, or shifts among the roughly 35% of voters still uncommitted could narrow the gap before ballots are cast.