Given that Barr was already looking into the question, his phrasing suggested he suspected there was more.

Sure enough, just days later the New York Times reported that in the summer of 2016 the FBI sent an undercover agent, a woman who went by the alias Azra Turk, to London to pose as Halper’s research assistant and tease information out of Papadopoulos. (The Times was so reluctant to call Turk a spy that it referred to her, in a headline, as a “cloaked investigator.”)

So now there are Halper, Turk, and the Page FISA warrant. If they represent the totality of the FBI’s surveillance, that would still be a pretty anemic response to what some in the bureau viewed as a full-scale Russian attack on American democracy.

So the key question of the Barr investigation will be: Is there more?