Last month Rush Limbaugh remarked that the reason for "the re-establishment of climate change and global warming as a new primary impetus of the White House" is that "it offers the president opportunities to be dictatorial."

A defender of the president might counter that "dictatorial" is overwrought. After all, whether or not his proposed regulations are wise, they are based on an act of Congress and an interpretation of that law that has passed muster with the Supreme Court. They won't take effect...