After Congress turned down President Obama’s request to enact a law regulating power plants’ greenhouse-gas emissions, the Environmental Protection Agency turned to the states—not with a request, but with instructions to carry out the president’s energy policy. The EPA’s "Clean Power Plan" now faces the scrutiny of the nation’s chief regulatory review court, the U.S. Court of Appeals for the District of Columbia Circuit.
If the Constitution’s federalism is to endure, the Clean Power Plan must be struck down.