Finally, the FBI says that the memo has material omissions, and Democrats contest key allegations in it. Resolving this shouldn’t be difficult: The counter-memo produced by the Democrats should be released, as well as underlying material including the transcript of the interview with Andrew McCabe, which has become the subject of a he said/he said between committee Republicans and Democrats. Perhaps the surveillance of Page bore some fruit; if so, we should hear about it. The more information the public can get about all of this, the better.

There is speculation that President Trump might, in response to the memo, fire Deputy Attorney General Rod Rosenstein, who oversaw one of the renewals of FISA warrants on Carter Page. Trump made one of his patented ambiguously threatening remarks about this possibility on Friday. If he were to move against Rosenstein, it might cause a semi-collapse of his Justice Department, give further fodder to Robert Mueller, and undo the political headway Republicans have made in recent weeks. Trump should sit tight and — if the investigation is as unfounded as he says — await his eventual vindication.

The Nunes memo has broken the seal on information related to the start of the Russian investigation; the republic will survive, and in fact, benefit from an airing of the circumstances of this episode.