Arizona's Secretary of State's Office is working to ensure the election is tamper-proof, even as Republican presidential nominee Donald Trump is laying the groundwork to challenge the nationwide vote.
Next week, election officials will test and zero-out election machines across the state. To protect against hacking, the machines are never connected to the internet and they get tamper-proof seals as a safeguard against physical attacks.
People need proof of citizenship to register to vote and must show identification at the polls.
After November 8, Trump must act fast if he thinks the election was rigged in Arizona.
"You have five days after the election is over to go to a judge," Republican Secretary of State Michele Reagan said. "You have to convince a judge you have a cause, and it would actually change the outcome of an election."
Making a speech to supporters Thursday, Trump said, "I will totally accept the results of this great and historic presidential election...if I win."
Arizona has emerged as a possible swing state on Election Day, with at least one projection indicating the state may turn blue for the first time since 1996.