As soon as the president took it from the white house they were declassified by his power as the chief executive. Declassified stamps and markings are employed by whom? Has each elected president been given an official stamp of some kind that he must use to make it official? Take it to its logical conclusion you can see how this case is total BS.
“ As soon as the president took it from the white house they were declassified by his power as the chief executive.”
A lot of people claim this, yet no one can point to any law, rule, regulation or court precedent to support this. And as a matter of logic, it doesn’t make sense. When Trump was president, I’m sure there were a lot of documents he took with him when he travelled, but those documents were not automatically declassified the minute they left the White House. If that were true, and say someone accidentally left those papers where a member of the public could access them, or even if someone stole them, then no one could be held responsible for mishandling classified documents, because according to your position, just the fact that Trump took them out of the White House means they were declassified.