In traditional primary elections in Arizona, independents can choose to vote a Republican or Democratic ballot.
But the Presidential Preference Election is different. Voters have to be a registered Republican or Democrat, at least temporarily, to participate on March 19.
Tuesday, Feb. 20, is the deadline to change your party affiliation ahead of that election. Early ballots will begin being mailed out on Wednesday.
Maricopa County residents can check their registration at beballotready.vote.
Other important upcoming Presidential Preference Election dates
Feb. 21: Early ballots mailed and early voting begins
March 8: Last day to request an early ballot
March 12: Last day to mail back ballot
March 19: Election Day