Does the mainstream media have a liberal bias? On a couple of things, maybe. Compared to the American public at large, probably a slightly higher percentage of journalists, because of thier enhanced power of discernment, realize they know a gay person or two, and are, therefore, less frightened of them.
Lies: And the Lying Liars Who Tell Them (ed. Penguin, 2004) - ISBN: 9781101219447