MinnPost: Fox News commentator Bill O'Reilly and presidential candidate Michele Bachmann sparred over the debt limit last night, with Bachmann insisting the United States has enough tax revenue to pay off the country's obligations without raising the limit. O'Reilly started the interview with Bachmann by telling her that he thought it would be "catastrophic for America" if the debt ceiling isn't increased. Bachmann has opposed raising the limit.