I don’t think the President is “running late” ... I think team Trump is letting the Biden/Harris “event” settle in.
LOL! When has one of these things ever started at the announced time?
I think DJT has watched the old BBC series "The Fall and Rise of Reginald Perin" and borrowed the tactic of Reggie's passive aggressive boss C.J.
When summoned was summoned to C.J.'s office and knock the boss would recite:
1-2-3-4 make'm sweat outside the door
5-6-7-8 always pays to make'm wait
9-10 "Come in, Reggie!"