Columnist: Fox News' reputation and credibility are 'deeper than ever in the toilet'

Everywhere you look American conservatism is shedding its stars like a failing Broadway show in its final days. Bill O'Reilly, the so-called King of Cable, is, as one wag put it, no longer a "factor." Nice touch, there! But O'Reilly is not alone among the right-wing casualties, merely the latest. His erstwhile boss, Roger Ailes, led…