McMullin's success came about only because of Trump. Despite the wishes of many of my fellow Democrats on this forum, "Trumpism" is not a movement that will stay in the Republican Party for long. His ideas and his movement will die out with his campaign. Trump isn't Goldwater in the sense that he gave an indication of things to come for the party, he is Wendell Willkie. He'll lose, and then subsequently be forgotten.
This. Those licking their chops of a party system that involves a band of deplorables vs. a Dem coalition that is pretty much "everyone else" are going to be SORELY disappointed.