Russert did no follow up, probed none of his answers. They just went thru their charade and no doubt high fived each other after the show.
I don't know why so many people (many of them conservatives) give kudos to Russert for asking tough questions. Even if he does ask tough questions, he lets his liberal guests ignore and sidestep them without keeping them on point.
This is what I liked about O'Reilly when I used to watch him. He was the first interviewer to say "I don't think you answered the question" to his guests.