
TV Newser lists the top cable news shows, "in the demo"--that is, audiences 25-54, and finds that 12 of the 15 are on Fox. La Anderson Cooper, the emo newscaster who strains for the "Gap ad" viewership, is a miserable 16th, and Krazy Keith Olbermann, who increasingly resembles Howard Beale of "Network," is down at 20th.
So yes, CNN and MSNBC are in a duel--a duel for distant second place.