Everything is politically slanted, Fox simply goes against the grain of other networks who, while they compete, generally tend to hold a consensus on how things will be spun. Speaking soley by the US, with a Democrat/Republican divide that is pretty much 50-50 with a few percentage points going either way at any moment this means your going to find lovers and haters for both sides. The left wing having always been more vocal, and more ready to jump on when the other side makes a mistake. The right wing having more of a "silent majority" type attitude on a lot of things despite what many might think, which is in part why the numbers are so easy to misunderstand (and understand the right wing does not literally have a majority at the moment, the last non-slanted figures showing roughly a 7% lead in the other direction, though how that has actually changed at this point is anyone's guess).
Truthfully it would be nice if there was more balanced reporting on both sides, but as things stand now it seems that the two big "poles" seem to be CNN and Fox News on the extremes. CNN isn't likely to change as long as Ted Turner and Jane Fonda are still kicking, and Fox isn't likely to change as long as almost everyone else is liberal since pulling a bit to the right is what sets them apart from the pack.
In the end I honestly don't think there is such a thing as a truely impartial source of unfiltered information out there. Except for perhaps ironically a few sites like "Encyclopedia Dramatica" which (and seriously, if your laughing, think about this) exists to mock everyone, and when you get past the "lulz" they generally do quite a bit of research on whatever it is they are busting on, and when it's a "serious issue" which is only covered recently they draw from both sides. They rarely cover anything serious though. This is a rather extreme opinion, but there is a reason why on certain subjects I actually link to them with a disclaimer. Ironically in their attempt to basically "offend everybody", but do it with a certain level of quality, they have actually become a more reliable source of information (complete with referances to their sources usually) than actual news reporters. That is both really sad, and should also tell you what opinion I have of the news networks including Fox despite me pulling right a lot more than left on most things.