Washington Post: Two weeks ago, the US Senate’s Democratic leadership dropped provisions in a climate bill that would have tackled climate change. In principle, the White House can now step in, thanks to a 2007 Supreme Court decision that allows the Environmental Protection Agency to regulate greenhouse gases as pollutants. The Washington Post‘s David Fahrenthold and Juliet Eilperin look at whether the White House will use the EPA option and, if it does, what political and legal battles could ensue.