That guy simply doesn't care about anything (except his ego and money) that isn't related to his re-election. If banning bitcoin will help his campaign he will do it in a matter of seconds, otherwise he doesn't care.
I don't think that Bitcoin is in his focus or that he is planin to ban it.
You are right.that he only cares about himself and how to be re-elected and I don't think that Bitcoin can help him in that. Americans are not so focused on Bitcoin or cryptocurrencies in general and he can't blaim Bitcoin for the problems America has. Ban will not bring him advantage of any kind so I don't think he will do it although I beleive he is capable of really everything.