Environmental Protection Agency Administrator Michael Regan says he's willing to wield broad regulatory power to enact President Biden's climate agenda if Congress fails to pass meaningful climate legislation. Think about that: the Constitution is quite clear about who, in the federal government, has sole legislative power. Here it is, in Section 1 of Article I: All legislative Powers herein granted shall be vested in a Congress of the United States, which shall consist of a Senate and House of Representatives. There's nothing ambiguous about that language. Yet Michael Regan, a man no American elected, who's spent his entire life as...