Media Life: The controversy surrounding Fox News’ Bill O’Reilly and whether he lied about events he covered years ago as a reporter has sparked a conversation about the credibility of cable news. Are Fox News Channel, CNN and MSNBC credible? And which one of the three has the most credibility? By a very slim margin, media buyers and planners think it’ CNN, with Fox News a close second. MSNBC is not even a consideration, according to a recent poll.