Overview
- Republicans cast ballots on Tuesday, July 21, 2026, to pick a nominee to face Democratic Gov. Katie Hobbs and to settle several competitive U.S. House primaries that will shape November’s battleground map.
- Rep. Andy Biggs entered the primary as the frontrunner with President Trump’s endorsement and backing from Turning Point Action, and he is known for leading the House Freedom Caucus and for his role in efforts to challenge the 2020 certification.
- Rep. David Schweikert ran as a pragmatic, pro-business alternative who gave up his competitive 1st Congressional District seat to pursue the governorship and argues he can win independents in the general election.
- The open 1st District is a top national battleground with Trump-backed Jay Feely, Joseph Chaplik and John Trobough competing for the GOP nomination while Democrats choose between DCCC-backed Marlene Galán-Woods and Amish Shah.
- Arizona’s heavy mail-voting system produced about 755,000 ballots cast before Election Day, so initial returns were expected the night of the primary but automatic recount rules and processing of late mail ballots could slow final results, and the Mark Lamb misconduct allegations — though cleared by the Pinal County attorney of criminal wrongdoing — remain a live political factor in his contest.