... what looks like intraparty tension on the surface is part of an intentional strategy in which Pelosi takes the heat on energy policy, while behind the scenes she’s encouraging vulnerable Democrats to express their independence if it helps them politically, according to Democratic aides on and off Capitol Hill. ... Democratic House aides say the energy agenda has been carefully gamed out in strategy sessions, and Pelosi always intended to take heat on gas prices while tacitly encouraging more vulnerable Democrats to publicly disagree with her and show their independence.