ClimateWire: President Obama will try "depoliticizing" the issue of climate change, his top aide on the issue said yesterday, raising questions about how that can be achieved as his administration appears poised to pursue embattled regulations on carbon. To some observers, the assertion yesterday by Heather Zichal, Obama's deputy assistant for energy and climate change, suggests the president might be planning to launch an appeal to the American people. He's been asked by various groups to hold a summit-like...