> who could be Trump II? <
He’s not perfect (who is?), but I would suggest Rand Paul.
There isn't really any Republican right now who scores high enough in charismatic speaking - and it will be a critically important quality to counter the "Free college/free health care/free love...in exchange for all the rest of your freedoms!" message the Democrats will be pounding out in 2020.
No way. besides I don’t think he’ll be interested.