If a sitting president is in some circumstances subject to criminal subpoenas from state officials, a former president can most certainly be subjected to criminal process by federal agents. This has never happened before, but as with all things Trump, the past is no guide to the present.

Still, the American public needs to see the warrant — all of it. The former president has a copy; he should make it public. It likely lists the items to be seized and the laws allegedly violated. The affidavit supporting the warrant is probably sealed, former prosecutors say, and Attorney General Merrick Garland can seek to unseal it.

Citizens need to know whether this a reasonable search based on probable cause of some crime by someone with access to Mar-a-Lago — as a judge has clearly decided there is probable cause to conclude — or yet another unmerited strike at the 45th president by the latest in the long line of former federal officials who have tried to take Donald Trump down a peg, or behind bars, and failed.

The questions are: What is the Justice Department looking for, and was this necessary?