Critics can be your most important friend. I don't read criticism of my stuff only because when it's bad, it's rough-and when it's good, it's not good enough.
I don't have any particular beef with Barbara Boxer. My beef is with the official Democratic doctrine that anybody who reaches Boxer's position has to spout and has to endorse.
Some people are like wheelbarrows; useful only when pushed, and very easily upset. The time to stop talking is when the other person nods his head affirmatively but says nothing.