David Gergen: “To joke about guns and Barack Obama is the single most tasteless thing one can do in American politics.”

If he comes out and throws cold water on this, then I don't think it goes anywhere.

I don't think Trump is out of the woods, even though his poll numbers are not only staying up, they have actually been strengthened some.

It's very, very big. Not legally, but politically, it's a very, very big deal.

I think a lot of Americans do see it as disqualifying. And they're worried about it.