Is Bill O'Reilly moving to the left? It's a reasonable question, given the Fox News commentator's recent tough talk on Tea Party favorites Michele Bachmann or Christine O'Donnell. Jon Stewart--no fan of O'Reilly's in the past--says it's Fox, not O'Reilly, that's different these days. "You've been overtaken by a more extreme version of you. You're like Fox 1.0. You're the beta version," Stewart told O'Reilly during an appearance on his show Wednesday night. "Fox 2.0 has jumped over you...on this network, you're left-wing."