Agence France-Presse: The US Congress could pass a sweeping bill to fight global warming in 2010 despite a challenging election-year climate for the legislation, Democratic House Speaker Nancy Pelosi said Thursday. Asked whether Democratic representatives, many facing the fight for their political lives in the November ballot, would be willing to vote on a measure that critics have branded a covert tax increase, Pelosi replied: "Yes." "They’ve already gone down that path," she noted, referring to …