I think Barr may be giving some cover to Trump because he knows the only nefarious reasons the documents were at Mar-a-Lago is as trophies for Trump to show off to his guests. He could brag about knowing the full scoop on bin Laden with actual documents. He has his love letters back and forth to other powerful leaders like Kim Jong-un. That's how important he is. He could prove it. No one had better proof than he had. He had the best proof.