Politico: Speaker Nancy Pelosi promised again Tuesday the House would pass a climate-change bill by the end of this year, despite the entrenched reservations of moderate Democrats. Even if the Pelosi muscles a bill through the House, few expect that legislation to go anywhere in the Senate, which will soon be bogged down in a major health care debate. Despite that hurdle, House Energy and Commerce Chairman Henry A. Waxman (D-Calif.) reiterated his own promise on Tuesday to move major …