Here's a tasty little tidbit from a post titled Why Fact Checkers Fail:
So here's what we did — what I did — and what others have certainly done as well: I downplayed Republican dishonesty while judging Democratic failings with an unfairly harsh bias. I applied this to assignments, to the tone and presentation of stories, and to the various gimmicks we invented to try to evaluate claims. The results didn't reflect the true scale of the dishonesty gap, but they at least demonstrated that a gap existed. At least, they had the potential to demonstrate the gap, but only to very careful readers with a knack for drawing subtle inference. Because we could never come out and tell you what we all knew in the newsroom: Yes, "all politicians lie" (a cynical dodge if ever there was one), but the modern Republican Party is based on a set of counter-factual and faith-based beliefs, and has been for years. Not only has that foundation consistently put the party on the wrong side of fact-checkers, it has led us to where we stand today, with Mitt Romney running a campaign that has abandoned even the pretense of fact.
There has to be some middle ground between partisan media hacks and spineless media hacks but it seems to be unpopulated at the moment.