The entire idea of there being a “liberal” media is just silly. Media outlets in America are owned by corporate interests and the news reflects those sensitivities rather than a liberal ideological bias. Media Matters for America is a project that attempts to monitor the media and offer corrections to stories that leave out the progressive message. They describe themselves this way:
Media Matters for America is a Web-based, not-for-profit progressive research and information center dedicated to comprehensively monitoring, analyzing, and correcting conservative misinformation in the U.S. media. Conservative misinformation is defined as news or commentary presented in the media that is not accurate, reliable, or credible and that forwards the conservative agenda.
Check out this site and look at some of the interesting stories they’re reviewing. This is a great resource for those who keep track of the media and political new coverage.