(CNN) – With less than 24 hours to go until Election Day, Republican senator and former presidential nominee John McCain said he's seen unprecedented anger from veterans over the September attack on the U.S. Consulate in Benghazi, Libya that could influence Tuesday's election.
"I've been traveling all over the country and veterans are angry. They're angry; they're upset; they don't trust Barack Obama. There's 1.6 million of them in Florida, for example. I think they could have an impact on this election," said McCain appearing on CNN's Starting Point Monday.
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While conceding the focus of this election is jobs and the economy, McCain said "I've never seen veterans as upset and as angry as they are over Benghazi."
McCain, a war veteran himself, has been a high-profile voice in a powerful chorus critical of President Barack Obama's administration's handling of the attack in Libya that resulted in the deaths of four Americans, including U.S. Ambassador Chris Stevens.
"This cover up is worst that I've ever seen, either incompetence or cover up. There was no demonstration," he said. Critics have accused the administration of laying blame for the attack on mobs angered by an anti-Muslim movie and for failing to properly recognize the security threat in the region.
"There was no demonstration there," McCain repeated. "There was no hateful video and the Libyans called it right away and everybody knows it."
On a lighter note, the man who was in Republican nominee Mitt Romney's shoes this time four years ago and the last presidential candidate to faceoff with then-Illinois Sen. Obama said right now Romney is feeling the "adrenaline."
"You're going hard and you know really this is your last shot," said McCain of the final days of his presidential bid in 2008. "We certainly did know that in 2008 because we were aware of the polls but it's such an exciting and incredible experience. And how few people in history have ever had the opportunity."
Joking, the Arizona senator added:
"I have a line that I use all the time: After I lost, I slept like a baby: sleep two hours, wake up and cry, sleep two hours, wake up and cry"
–CNN's Michael Pearson contributed to this report.