Yes, there will be bias in the news. But damn it, when it's as blatant as it is today, or worse, when it's pointed out and people actually defend it, that's where I start drawing some hard, deep lines. Only a damned fool defends that kind of crap and expects to retain viewers/readers/listeners.
I know, for example, that Rush Limbaugh is expressing an opinion. That's what he gets paid to do. But, you have an obligation when you do so to also provide the facts behind that opinion. (Sort of like a lot of folks expect around here. And that's generally a GOOD thing.) And you have an obligation to present all the facts, not just the ones you like.
It's even more important when you're doing straight news. And if you can't get that through your head, then you need to get out of the news business, and get a job in Hollywood. Because you're no longer reporting. You're now an entertainer.