He NEVER conceded!
All true. And he travels openly in a full presidential motorcade with ambulance. Something an ex president does not get. When Trump recently landed at Dallas and Phoenix they closed the airspace. Something an ex president does not get. He showed up at the Connor McGregor fight with a 30 man state Dept level security force. Some of them looked like spec ops guys. Trump has been meeting regularly over the summer with his cabinet at Bedminster.
I would theorize that one other way you can believe Trump is still the President is because if he was not being protected by the military or a portion of the military he would already be dead.