Former White House national security adviser John Bolton learned what it means to be at war with a merciless White House on Friday.

The ex-Trump adviser turned acidic critic returned to his home in Bethesda, Maryland, nearly eight hours after the FBI raided the property.

Bolton waved to the cameras but did not take questions from the press as he entered his house to greet his wife, who was visibly shaken by the federal dragnet.

The investigation into Bolton centers around whether he illegally shared or possessed classified information, two sources told the New York Times.

Throughout the raid that started at 7 am ET, more than a dozen federal agents were seen carrying boxes in and out of his house. Other agents were spotted entering Bolton's downtown Washington, D.C., office.