Check out the intro to this amazing study from the political science department at UCLA:
Our results show a strong liberal bias. All of the news outlets except Fox News’ Special Report and the Washington Times received a score to the left of the average member of Congress. Consistent with many conservative critics, CBS Evening News and the New York Times received a score far left of center. Outlets such as the Washington Post, USA Today, NPR’s Morning Edition, NBC’s Nightly News and ABC’s World News Tonight were moderately left. The most centrist outlets (but still left-leaning) by our measure were the Newshour with Jim Lehrer, CNN’s NewsNight with Aaron Brown, and ABC’s Good Morning America. Fox News’ Special Report, while right of center, was closer to the center than any of the three major networks’ evening news broadcasts. All of our findings refer strictly to the news stories of the outlets. That is, we omitted editorials, book reviews, and letters to the editor from our sample. (boldface type added)
Did any of us doubt that a careful study would lead to this conclusion? How good is Brent Bozell's Media Research Center looking right now? Roger Ailes ain't feeling too poorly either.