Well, what do you know. The Federal Bureau of Investigation really did task an “informant” to insinuate himself with Trump campaign advisers in 2016. Our Kimberley Strasselreported this two weeks ago without disclosing a name.

We now have all but official confirmation thanks to “current and former government officials” who contributed to apologias last week in the New York Times and Washington Post. And please don’t call the informant a “spy.” A headline on one of the Times’ stories says the “F.B.I. Used Informant to Investigate...