David Gergen: “I continue to believe this is not yet over, and Obama is right to go out and warn his supporters against complacency.”

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

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.

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.