The only thing uglier than an angry Washington is a fearful Washington. And fear is what’s driving this week’s blitzkrieg of Attorney General William Barr.

Mr. Barr tolerantly sat through hours of Democratic insults at a Senate Judiciary Committee hearing Wednesday. His reward for his patience was to be labeled, in the space of a news cycle, a lawbreaking, dishonest, obstructing hack. Speaker Nancy Pelosi publicly accused Mr. Barr of lying to Congress, which, she added, is “considered a crime.” House Judiciary Committee Chairman...