David Gergen: “I think his testimony is going to be extremely important.”

The midterms really helped him. They transformed the race, best midterm elections for any president in 20 years.

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

One more sign that he just doesn't give a damn how he changes our traditions and overrides our norms.

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.