I think it is specious to claim that any news organization can be completely unbiased. Fox News at least permits speakers from across the ideological spectrum to speak on the network. They also challenge the reports and reporters who frequent the Mainstream Media.
If nothing else, Fox News provides a much-needed perspective that is suppressed or ignored by the major television networks, which erroneously and arrogantly claim to be unbiased, floating above the partisan fray. Consider, for example, Diane Sawyer's inaccurate editorializing about the Arizona immigration law. Wallace did not have to cut, paste, edit, spin, or distort that segment to expose discomforting bias.
Despite his guest's numerous attempts to filibuster the interviewer, Wallace successfully pointed out that Stewart lampoons conservatives far more than liberals. “The Daily Show” host’s smear on Herman Cain's intelligence, reminiscent of the racist Amos 'n Andy show, was irreverent, unfunny, and unacceptable. Wallace even suggested that Stewart, in an attempt to legitimize his program, unwillingly takes pot-shots at President Obama.
More often than not, Jon Stewart betrays a liberal bias, yet claims to be above the fray because he is a "comedian," albeit a crude and calculating one. He is no better than the Mainstream Media which he mocks.
Once again, Chris Wallace owned Jon Stewart at his own game without condescending to his crass antics.