David Gergen: “The President today was talking about this is going to be the hardest decision - decision that he's going to make.”

It would have almost Shakespearean qualities to it.

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

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…