Updated

American politics has become an endless fox hunt. The hounds’ heads jerked up this week on news that Attorney General Jeff Sessions, responding to a request from House Judiciary Committee Chairman Bob Goodlatte, had asked the Justice Department’s career lawyers to look into the possibility of appointing a second special prosecutor, to investigate Hillary Clinton.

Set aside for a moment what the precise meaning of “investigate” might be. The day doesn’t pass anymore without a demand, from the Oval Office or the ozone, that someone should “look into” some political malefaction. Theoretically, we could have public officials being led to the executioner’s block weekly in Washington.

Indeed, the movement to name a second special prosecutor flows from the fact that the Washington press corps in January decided en masse to “look into” the notion that the Trump campaign had colluded with Russia to defeat Mrs. Clinton, a thought dropped into the water by the departing Obama administration.

What followed was a river of stories purporting Trump-Russian collusion. Months later, it remains true that the federal code recognizes no crime called “collusion.” Eventually the river of collusion stories joined with Oval Office mania over them to produce special prosecutor Robert Mueller.

Keep reading Daniel Henninger's column in the Wall Street Journal.