David Gergen: “Yes, he is, and good for him. I'm glad he's going down there in the arena and wrestling with this and trying to bring…”

Sadly, you know, I think for a variety of reasons he should not. I just, I don't think either Trump or Biden should be running.

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.

he ought to stay out of this.

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…