That's absurd. Listen carefully: Trumpty did not OWN a single one of those documents. They do not belong to him. They belong to the government, whether it's a Democratic or Republican administration.
Had Trumpty simply given the documents back, the matter would have been dropped. But no. He had to scream "They're MINE MINE MINE!!"
They are not. Not now, not ever. He has the emotional maturity of a four-year-old, and an intellect to match.