Because he knows he has done nothing wrong and he wants the truth out there. --Very similar to him wanting the Ukraine phone call transcript out there.
Show us the declassification order then, all problems solved. Why didn't he release the Ukraine call transcript himself?
Here is what most folks don't understand------The President of The United States can declassify any document at any time they wish. They don't have to have approval to do that. They do it themselves. ---In the Trump Administration, President Trump issued a standing order that whenever he removed documents from The Oval Office, they were automatically declassified. Thus, any documents that he had at Mar-A-Lago that were removed while he was president were declassified.
The President of The United States can order the military to attack or pass executive orders.Those orders require legal paperwork signed by The President,so does the legal action of declassifying classified information.