JD Vance is a douche canoe who would ramp it up 2x or 3x and would likely do the bidding of whatever master he follows now.

But no one likes the guy and I doubt he could inspire Trumps followers to the same degree Trump does. Without that rabid core base his power falls apart. Without a true leader, MAGA will start going at each others throats. There are too many factions held together and held in check by Trump.