PHOENIX - Sen. John McCain and wife Cindy hit the polls early Tuesday at Mountain View Christian Church.

Standing before a crowd of supporters chanting his name, McCain told reporters he was feeling confident.

"Looking forward to a victory today," he said. "We're confident, but you never know until they're all counted. Obviously on the national scene, especially control of the Senate, we may be up late tonight."

LIVE BLOG: Election Day 2016 in Arizona

The senior Arizona senator, and former Republican nominee for the presidency, is running for his sixth term.

McCain did not answer questions about other races in this tumultuous election.

He withdrew support for Republican presidential nominee Donald Trump last month.

While McCain didn't disclose his pick for president Tuesday, he'd said in the past he and his wife would write in "some good conservative Republican who is qualified to be president."