Long before becoming president, Donald Trump called for the jailing of his adversaries. Aided by Attorney General William Barr, he may now actually be training the full force of federal law enforcement against his enemies, real or perceived. Unlike Richard Nixon, who acted in secret, Trump is corrupting the justice system openly and publicly.

The seriousness of such a presidential abuse of power, and its potential for undermining the constitutional order, could well surpass any of the crimes detailed in the Mueller Report. Indeed, the Congress long ago recognized that such misconduct can merit impeachment.

Trump’s desire to investigate the investigators who uncovered the Russian plot to elect him president has taken on a special urgency since the release of the Mueller Report, with Trump repeatedly accusing government officials of “treason,” and the White House declaring: “This whole thing was a TAKEDOWN ATTEMPT at the President of the United States.”