David Gergen: “The attorney general is saying he's going to launch a criminal investigation. That says there are signals this is very…”

What we need is a commission. Kevin McCarthy ought to get on board and support it.

We're entering some kind of the most dangerous days of Donald Trump's presidency. He is erratic.

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…