The last gets to the absurdity of the Clean Power Plan on its own terms — it did virtually nothing to affect global warming. As Benjamin Zycher of the American Enterprise Institute points out, the Obama administration’s Climate Action Plan (which includes the Clean Power Plan) would reduce the global temperature by 15 one-thousandths of a degree by 2100. The point wasn’t to fight climate change per se, but to signal our climate virtue in the hopes of catalyzing action by other nations and, not incidentally, hobble the U.S. coal industry in favor of more politically palatable sources of energy, namely wind and solar.

Whatever the merits of this agenda, as a first-order matter, it must be enacted lawfully and not instituted by strained legal interpretations alone. In congressional testimony arguing that the Clean Power Plan is unconstitutional, liberal law professor Laurence Tribe noted that the Supreme Court has said that Congress doesn’t “hide elephants in mouse holes.”

If Congress had authorized the EPA to remake the nation’s energy economy, we would presumably be aware of it and recall an impassioned congressional debate over this radical and costly change. In fact, the opposite is true. Congress has declined to enact laws limiting carbon emissions, including when Democrats held both houses of Congress under President Obama.