Bah, I just looked for Drudge's weekly cable news ratings - couldn't find them. But MSNBC's shows are abyssmal - Mathews and Olbermann often switch top positions for the top MSNBC shows.
I think Nancy Grace beats them.
Crissy/Olberman grab like an extra 50,000-100,000 viewers down the stretch of election season, but their avg is like 300-500K viewers, as opposed to 2 million + for the top shows (OReilly, Larry King, H/C)