Here's a thought? Who cares.
USA Network and Air America each have a right to broadcast whatever they choose. Marlin Maddox was one this country's most revered conservative broadcasters. His legacy promulgates USA's direction, and it always will - conservative, D of I loving, Jesus-focused news. Air America has its pundits, regaled in their own right, and they can broadcast whatever they want. Some think it's right on and others think it's crap (just check the ratings for that sound off).
As for the rest of musings:
1. Censorship? Only if you work there, swinging for the other team. Otherwise, it's a matter of public opinion and freedom of speech because there are so many other selections out there for your politics du jour.
2. Bias? Networks, by and large, cannot be impartial. Imagine how vanilla that would be? Every local and national network has an agenda. It may not be as obvious as others, but believe me, it's there. So to pick on FOX and say CNN is middle-of-the-road (or the other way around) is ludicrous.
3. Anchors? I agree what you heard is suspect and you should pimp slap your sources. I know many people at USA and that couldn't be furthest from the truth. Now, what is broadcast is subjective, indeed. But to steer clear of Bush is way out of line. Bob Morrison was one of the first people to ensure USA had nice coverage of Rush and his imbroglio (and according to some, that's the flag bearer of the GOP).
4. Figure the source. If you are in N-E-W-S, I am not supposed to know your party or what side of the fence you are painting. But, if you are in NEWS/TALK, wear it on your sleeve. It may sicken some of us to see Oprah and Ellen stand up for a particular candidate, but it's not called OPINION for anything. The great thing about this dichotomy, one of those forlorn blowhards will be wrong come election day. See there, a brighter side of the street again. My work here is done. ;D