1) There's a process for declassifying a document

• The president's instruction to declassify a given document would first be memorialized in a written memo, usually drafted by White House counsel, which he would then sign.

• Typically, the leadership of the agency or agencies with equities in the document would be consulted and given an opportunity to provide their views on the declassification decision. As the ultimate declassification authority, however, the president can decide to override any objections they raise.

• Once a final decision is made, and the relevant agency receives the president's signed memo, the physical document in question would be marked — the old classification level would be crossed out — and the document would then be stamped, "Declassified on X date" by the agency in question.

Then and only then is the classification changed. A creepy orange man selling military secrets to his contacts at his golf club claiming that "Oh, but I reclassified them all in a standing reclassification order" does not, in fact, change the classification of any document.

2) This is legally irrelevant. 18 U.S. Code § 793 - Gathering, transmitting or losing defense information does not talk about the classification of the documents, only that they are "information respecting the national defense"

3) This is morally irrelevant, unless you are okay with an ex-president selling sensitive defence secrets to enemy nations if he can find a legal loophole.