Journalism in and of itself is "liberal" or "left wing" or whatever you want to call it. Its goal is the free dissemination of information to the public, whereas if you go towards the right of the spectrum with any sort of form of government there is an innate desire to limit the amount of information available to the public. Not all news outlets have a slant, some try to not take a side when discussing politics. Some outlets do indeed have a bias and they make it well known that they do, for example The Washington Post. Sure they lean to the left, and the editorials in that paper should be a telltale sign to anyone who can figure it out. Nowhere does it state that news outlets have to be completely impartial, which is why papers like The Washington Times or news channels like Fox News are similarly entitled to spin things towards the right. By paying attention to the sources on both sides people are able to take this information and figure out the whole picture. THAT is what journalism is about.