The Boston Globe described Humphrey’s vote as a “stunning development,” given the former senator’s conservative ideology and support for tea party groups. Many anti-Trump Republicans, including Sen. Kelly Ayotte, R-N.H., have said they will cast a write-in vote for a fellow conservative as an alternative to voting for either Trump or Clinton.

But Humphrey said the risk of a Trump presidency is too great to vote for anyone but Clinton.

“Trump’s attacks on women, the disabled, war heroes and minorities are disgusting. A normal person doesn’t do that. But Trump is not normal. He’s cruel. He’s shameless. He’s a bully. And it gets worse. Trump is simply unfit to be president. Do we want a commander in chief who’s temperamental, belligerent, unhinged?” he asked.

He continued: “Trump could get us into a nuclear war. That danger has not gone away, and it would mushroom with Trump’s finger on the nuclear trigger. For the sake of our families’ safety, let’s stand together against Donald Trump by voting for Hillary Clinton. It’s the responsible thing to do.”

Former GOP senator announces Clinton vote: ‘Trump could get us into a nuclear war’

Whoa!