Tuesday's general election will have Arizona voters deciding 10 statewide ballot measures, picking members of Congress and the Legislature and filling a full roster of state executive-branch officers from governor on down.
One of the state's two U.S. Senate seats is on the ballot, as are all eight U.S. House seats and every seat in the Arizona Legislature.
Outcomes of several of the U.S. House races will help determine which party has control of that chamber.
The ballot measures include ones on affirmative action, medical marijuana and health care rights.
Polls are open from 6 a.m. to 7 p.m. but many Arizonans have already submitted early ballots.