Since we're all just speculating here, let me join by asking, "Who would be both capable & willing to produce a forged 'original' that would pass muster?" These clowns can't even get a passable scanned file to pass the smell-test.
Anybody capable of doing such a forgery would have to be willing to keep his mouth shut and risk that the president would sick the long arm of the goverment at him once the deed was done. This is "Day of the Jackal" stuff.
Nooo, he spends millions to clean up archives and scare judges and talking heads