David Gergen: “If Rick Santorum wins, he has a very strong argument that this ought to be a one-on-one with Romney.”

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

Again, both sides are having an eye on the clock. In the Democrats' case, they really want to keep things speed up as much as they can, probably as they can because they know in November, they may lose the House of Representatives and the…

I think that really kneecaps the Biden ministration in a significant way.

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