Politico: Speaker Nancy Pelosi (D-Calif.) has set her sights on passing a global warming bill by the end of the year, pushing past strong misgivings from moderate Democrats in the House and Senate. Asked Thursday when the House would pass an energy measure that seeks to reduce carbon emissions and possibly impose a cap and trade system, Pelosi said simply: “This year.” Pelosi, who refers to climate change as “the flagship issue” of her speakership, said the political dynamics in the …