News stations, all of them Fox, CNN, MSNBC, etc are all guilty to some degree of being biased...the network stations to a larger degree, ABC, NBC & CBS, but they're all guilty to a degree...that's simply because these stations are run by humans, and opinions will naturally come out at some level.
That said, IMO, not a chance Fox is the most biased news organization out there...MSNBC and the 3 big networks have more times then I can count been guilty of making blatant false statements aimed at an agenda. Granted, Fox does at times seem to lean more right then others while CNN does lean a bit more left, but the other 4 mentioned are far, far worse.
As for E.D. Hill, one of the better news anchors out there. IMO, it's a shame people get worked up so easily these days over stupid things like this. But she's a good enough anchor IMO that a little bitching by a few will not ruin her...not by any means.