The U.S. Justice Department has issued arguably the least surprising revelation of the Trump administration.

It is that the former President Barack Obama did not order the wiretapping of Donald Trump’s campaign offices at Trump Tower in New York City in late 2016. OK, that’s not a surprise.

The announcement came in the form of a court motion issued Friday that declared that DOJ had no evidence of any such action.

What is heartening to me, though, is that this Department of Justice has made the determination. This one, which has as its head — Attorney General Jeff Sessions — who happens to be a close political ally of the president of the United States of America.

Yes, that would be the president who defamed his immediate predecessor by asserting that he ordered the wiretap in the first place.

Trump tweeted on March 4: “Terrible! Just found out that Obama had my ‘wires tapped’ in Trump Tower just before the victory. Nothing found. This is McCarthyism!”

He linked Barack Obama to the disgraced late Wisconsin Sen. Joseph McCarthy, the guy who gained infamy by accusing every Democrat and their brother of being communists during the 1950s.

Trump never produced a shred of evidence to back his cockamamie assertion about a wiretap. Former Director of National Intelligence James Clapper said he surely would have known about it had there been an order issued; it didn’t happen.

Former FBI Director James Comey — yeah, that James Comey — told Senate committee members that he saw nothing to back up the president’s assertions about a wiretap.

So, that case is closed, as if it ever really deserved to be opened at all. But when the president of the United States issues a phony accusation, then the nation and the world take notice.

What we all saw was yet another instance of bald-faced lying by the nation’s top elected official.

Disgraceful.