Is it concerning to me that a chunky white guy from Buffalo with a law degree whose job involves sitting all day dies a sudden death at age 58?? Oh yeah. More than a little.
Consistent with his training and education, Russert is one of the only political reporters whom I have seen on TV who actually did his work and prepared questions in a lawyerly fashion. Don't ask, "Well, aren't you in favor of X?" Say, "You said on July 1 that you were in favor of X and now you say you aren't?" Then have the film ready when they start to weasel.
Russert, of course, was great with the very low-tech "white board" during election coverage, and broke things down so that they were very easy to see and comprehend.
We have so many mediocre to flat-out awful people covering politics today. Losing Russert is like the Cavs losing LeBron and hoping to replace him with a low first-round pick. It just isn't going to happen.