David Gergen: “Republicans are -- clearly do not want to go over the waterfall with this president, if, by September, things haven't…”

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.

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…

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.