Rest in peace, big guy.
It's better to ask one question too many than one question too few.
(Added 4:19 PM) I'm still trying to collect my thoughts about this. Everyone knew, I think, that Russert was a big deal. But this might also be one of those cases where people didn't realize quite how big a deal until after his passing. In particular, the institution of Meet The Press -- precisely because it asked such tough questions and presented such real risks for candidates -- also gave them the opportunity to shift the national media narrative in a way no other news program could.