Lindsey Graham, the South Carolina Senator, has also called for the affidavit’s release because “we’re flying blind in the dark.” He’s right. This is an extraordinary case, and the public interest is enormous. Mr. Trump may run for President again, yet he is vulnerable to leaks from the government that damage his reputation but may have little factual basis.

Last week someone told the Washington Post that Justice believes Mr. Trump had documents related to nuclear secrets, but the warrant revealed no such evidence. It did contain a reference to possible violation of the Espionage Act but again without evidence or elaboration.

We should add that Dow Jones & Co., the owner of this newspaper, has filed a motion with the court seeking the release of the affidavit. “Continued concealment is likely more injurious than disclosure,” the motion says, “as the nature of political discourse, which abhors a vacuum, has pumped all kinds of sensational suppositions into the informational void.”