Why would Trump leave what he loves doing, being where he loves being, and making the kind of money he loves making if he’s not sincere in wanting to turn America around? Doesn’t make sense. If he were an “impostor” what would be in it for him that could possibly be better than what he’s already got?
I think the enduring power and glory of the Presidency is Trump's motivation. He craves the worship. He is an impostor because there is nothing conservative about him.