The Clinton case set the precedent that the President gets to keep whatever he wants, without qualification as to classification status (tape recordings of classified conversations). The same thing was true for Obama, who basically left with a storehouse of documents.

There is another legal perspective that this law pertains to the employees and officers of the Executive branch, but not the President...as it cannot be the case that the Legislative branch directs the President (personification of the Executive branch) by enactment of legislation. That would breach the co-equal powers and privileges specified in the Constitution.

There was a video posted previously on GA (50 minutes into a 2 1/2 hour length) where an evidently savvy lawyer elaborated on something like half a dozen causes for outright dismissal, based on the Constitutional immunity of the President from the alleged laws. His basic point is that it can't be the case that the Deep State gets to determine what the President is to see; the rule of superiority is that the President alone determines what he gets to see, as he is the apex of authority in the Executive branch.

I am concerned that Trump may not be served well by his lawyers. They may not be willing to push this to a Constitutional confrontation, which is where the matter lies.