The decision by Kyl, 76, was not unexpected. He had retired from the Senate in 2012 and said when he took the appointment in September that he only committed to serving until the end of the year. His resignation is effective Dec. 31.
Rep. Kyrsten Sinema won the Arizona Senate seat being vacated by Republican Jeff Flake to become the first woman to win a U.S. Senate seat in the state.
The more than 5,200 active-duty troops being sent by President Donald Trump to the U.S.-Mexico border will be limited in what they can do under a federal law that restricts the military from engaging in law enforcement on American soil.
Kyl — a Republican who retired from the Senate in 2012 to spend more time with his family — is currently shepherding Trump's nomination of Brett Kavanaugh to the U.S. Supreme Court. Kyl's appointment will make it possible for him to vote for the nomination.
For all the worries about Russian hackers and other cyber-vandals voting problems this week in Arizona served as a reminder that one of the biggest threats to fair elections is plain old human error.