Trump would have to have the docs in his hands to do that, and I can assure you he does not have them—they’re sitting in servers in the various intelligence agencies, and they will not just toss them on a hard drive and hand them to Trump, even if he declassifies them.
Time for someone in his admin to pull the Sandy Berger routine. He’s the guy who stole a bunch of classified dox at the end of Clinton’s term.