We learned a lot about the inspector general’s report as its author testified Wednesday before the Senate Judiciary Committee. For example, we learned that not even Michael Horowitz could say the FISA warrant against Carter Page and its three renewals actually turned up important information, and yet it just kept getting renewed.

Of course, most of the attention is being directed toward the infamous Steele dossier and what role that bit of opposition research played in securing that FISA warrant, but the Wall Street Journal’s Kimberley Strassel has found one line buried in the document dealing with the timeline, and she says it brings up a question that must be answered: who knew what in the spring of 2016.