I’m not as convinced as you that they will simply disappear. I think the best that can be hoped for is Trump gets roughly 45% of the popular vote. This is despite all the evidence that he is utterly unfit for office and in severe mental decline. It’s an astonishing number given how he presents himself and to simply attribute all those votes to the cult of the individual is hugely simplifying things.
There’s the evangelicals for a start. They aren’t going away and they represent a vision of America that is wholly at odds with others in a way that seems irreconcilable. You then have a body of white working class people who have been left behind as American industry declines and gets displaced to the developing world, as it will most likely continue to. These two grouping alone count for (I guess) a third of the electorate and their grievances aren’t going away, especially when, if Trump loses, the President will be stridently pro-choice.
What has been remarkable about Trump is his ability to appeal to both those groupings simultaneously, especially the Evangelicals, given he is plainly a wholly Godless individual and I think it will be difficult for someone to repeat the same trick, but irrespective, from what I’ve observed, I think neither grouping will simply disappear and will require a political home, which is likely to widen the divisions in the nation if it is away from the Republican Party.