David Gergen: “This is a legislative victory for the president, a big tax bill, a repeal of the Obamacare mandate among other things.”

I think Chuck Schumer will have to pay more attention.

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 we're in an unsustainable path. It's compared to being in a car on the edge of a cliff, and middle of the night with it with a rainy and no headlights.

It's increasingly hard to govern.