AZ is not a full open primary. The only people who can vote in the Repub primary are registered Republicans or registered Independents. Same for Dem primary,... Dems and Indies only.
Must be registered as such 29 days before the election.
Republican 34.63%(1,264,154), Independent 34.04%(1,242,532), Democratic 30.27% (1,104,927)
Nearly 69% of AZ gets to vote in the GOP primary, although only 35% of Arizonans are Republicans.