And those other cards that identify which reporters to call on.
He personally instructs the Easter Bunny and Jill when they are supposed to move him along. He doesn't want to seem pushy, himself.
He keeps his calendar blank because he doesn't want to be perceived as one of those workaholics who are always doing things.
When it seems like he is wandering aimlessly around a stage, he is actually following secret service protocol to introduce random movements to foil any snipers.
He refuses interviews because he doesn't want to embarrass reporters with his deep command of all the trivia and minutia of the Executive Apparatus. Most of their questions would seem ridiculously naive.