Not true at all. People are constantly talking about the liberal bias of the MSM media, CNN and MSNBC in particular. The difference is, all of those networks admit it, and none claim to be fair and balanced when they're clearly not.But nary a word is said about the liberal bias of so many of the MSM shows, to say nothing of CNN or MSNBC. Once again, the bottom line is ratings and Fox is by far the leader of the cable networks.
As for Fox's "news" shows, they aren't fair and balanced, either, at least when it comes to any news story that is political. They pick and choose which stories to tell, and carefully craft them with a bias. Yes, all the other networks do the same thing, I know that, but they aren't doing it hypocritically.
If you repeat a lie often enough, people will believe it. Fox News knows that, which is why they keep telling people over and over and over again that they're fair and balanced.