The real question here is who in the GOP will be the David Miscavige to Trump's LRH, and will the cult follow a successor

The cult will splinter. Many will try to be the next glorious leader, but they all lack the needed reality distortion field. Junior will get a chunk and may align w/ Kushner. Cheney/Romney will try to bring some back to the 'mainstream'. JDV could get some if DJT dies in the next 6 months max.