It's always fun to see someone take the highly overrated Rachel Madcow to task about something.... and expose her as the fool she is. It's absolutely hilarious to watch 18 minutes of such an event.
In this clip, she appears to be utterly exasperated for not being able to get this man off message, that is... off the issues that his opponent does not want to talk about in public. She would rather try to take something he wrote during the course of scientific debates that occurred 15 years ago, than speak about the present.
Utterly brilliant job... and done by a man who is much smarter and a thousand times wiser than she is. It must really get her goat.