--"Let's not talk about what Clinton did, let's talk about how Bush has failed."
If the above quoted, carefully coifed, empty headed, 'talking Head' can say that and get away with it, one may assume that Fox is trending Left. Perhaps Fox's owner is more partial to the Left and the Dems than was assumed by many.
Certain of Fox's shows have indeed been trending left. Mornings tend to be leftish; Gibson and Hume a bit more to the right, which isn't to say they favor the right, just more of a balance.