David Gergen: “I am -- I'm just mystified, because his strong suit -- George W. Bush's strong suit has always been, he's…”

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

If he had a receptive audience, and I will tell you, when everything -- when all the facts were to come out, it would be like Nixon and the tapes.

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

You can't out-Nixon Nixon very easily, but Donald Trump has.