They don't even have to believe it, they just have to believe in nothing. If you watch the Chris Cuomo interview on the Adam Friedland Show, the distinct impression is that he doesn't believe in anything, knows it and is proud of it. Either that or he is doesn't ever indicate that he believes in anything, knows it and is proud of it. The effect is the same, he is chosen not only because of his connections to politics, but also because of his lack of belief in anything outside of himself. Hell, even he doesn't believe journalists, but that never stopped him from reporting their stories.