It doesn't matter if they do or don't continue with the Trumpism, that isn't the point. The point is that they are self-interested and without a tentpole they splinter and factionalise, with every drongo trying to replace the leader they'll grind each other out until either the movement collapses and is replaced or someone unites them but only after crushing a lot of opponents and weakening their ally pool. It's taken Trump well over a decade to amass this support not just popular but internal support, it took years of consolidation for even his VP to coalesce to Trumpism.