Politico: Environmentalists who see this year as their best hope for a major global warming bill can’t seem to escape a familiar foe: former Bush administration officials they fought year after year on energy and climate issues. As the House Energy and Commerce Committee debates its ambitious cap-and-trade bill, environmentalists will find James Connaughton, President George W. Bush’s top environmental adviser, advocating for Constellation Energy. Karen Harbert, a top Bush Energy Department …