According to the indispensable website RealClearPolitics.com:

Led by the trio of Bill O’Reilly, Sean Hannity and newcomer Glenn Beck, Fox News maintained its hold as the leading cable news network for March, as well as the first quarter of 2009. Fox News’ primetime viewership of 2.3 million was more than the combined total of No. 2 CNN (1.1 million) and No. 3 MSNBC (957,000). HLN, formerly Headline News, is fourth (330,000).

Overall, Fox News has nine of the top 10-viewership cable news programs. Bill O’Reilly remains the nation’s leading cable news program host. Sean Hannity, now flying solo with his show, has seen his ratings increase 36 percent from the same period last year. And Glenn Beck has increased viewership for his time-slot by nearly 100 percent from a year ago (before he joined Fox). So Fox, long the dominant cable news station in America, is now more dominant than ever. That must make the left in America cringe. And having watched a bit of MSNBC’s prime-time line-up since Obama won the election — one can only take these things in small doses — it’s fair to say the network wasn’t suffering from Bush Derangement Syndrome; it was suffering from Derangement Syndrome, period. Bush just happened to be the focal point of their fury. Now that he has left the scene, their cast of characters have to look for other targets at which to lash out. They look as silly now, as sycophants and courtiers in the Age of Obama, as they did then, as melodramatic, unhinged critics during the Age of Bush.