David Gergen: “I don't think it really helps the president. I mean, you cannot separate Dick Cheney out from George W. Bush in the…”

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 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…

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.