WASHINGTON -- All but 13 of the 289 Republicans in the House and Senate have signed a pledge vowing to oppose tax increases. On Thursday, the author of that pledge met with some of them to help them understand exactly what it is they signed. In the process, anti-tax activist Grover Norquist sparked a fresh barrage of criticism from Democrats who accuse him and his pledge of being one of the major impediments to a bipartisan debt-cutting deal.