Glenn Reynolds quotes a commenter on DailyKos.
I disagree. Saying that Hillary was President is like saying Yoko Ono was a Beatle. Yoko Ono definitely had a Beatles experience. The serious question here is whether one gains something useful by watching someone else do a job and being in a position to have many deep and involved discussions with him about his work as a trusted advisor. This experience alone won't make you the equal of the person you've observed so closely. You'll have to practice the finger movements before you can play guitar, and your aptitude for the job hasn't been tested. It's not everything but it's not nothing.