David Gergen: “It is time keep an eye on the Republicans in the Senate.”

Maintaining the status quo with regard to the filibuster is unacceptable for him.

It's very, very big. Not legally, but politically, it's a very, very big deal.

I think, basically, this is about power. I think he wants to cripple Joe Biden before he ever gets started.

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