"I like Joe. Joe is a decent guy. And I do not want this campaign to degenerate into a Trump-type effort where we're attacking each other, where it's personal attacks."
"Everybody knows that young people do not vote in the kind of numbers that older people vote. I think that will change in the general election."
He says he wants to give her the space to do that.
On the vitriol toward her: "I'm disgusted by it," he says.