David Gergen: “The political malpractice in my judgment would do that to her.”

I think the turning point that came were the midterm elections. The fever broke with those midterm elections. And what we've seen since then is a steady decline in Trump's credibility and in his position with the American people, and a…

The midterms really helped him. They transformed the race, best midterm elections for any president in 20 years.

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

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