David Gergen: “It's a much bigger deal than anybody would have expected, Jim.”

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 it's going to take something usually unexpected or a dramatic change in his health or a prison sentence to stop him.

It's increasingly hard to govern.

It is time keep an eye on the Republicans in the Senate.