A Trump adviser said the former president’s reluctance to relinquish the records stems from his belief that many items created during his term — photos, notes, even a model of Air Force One built to show off a new paint job he had commissioned — are now his personal property, despite a law dating to the 1970s that decreed otherwise.

“He gave them what he believed was theirs,” the adviser said.

“He gets his back up every time they asked him for something,” said another Trump adviser. “He didn’t give them the documents because he didn’t want to. He doesn’t like those people. He doesn’t trust those people.”

John F. Kelly, Trump’s former chief of staff, said the former president had long exhibited a lack of respect for the strict rules for document handling sacred to the intelligence community, which is in the business of guarding the country’s national security.

“His sense was that the people who are in the intel business are incompetent, and he knew better,” Kelly said. “He didn’t believe in the classification system.”