The pieces will reassemble back to a two party system, Democrat and Libertarian, and the Grand Old Party withers off just as the Whig party from which it descended did in 1856

Michael Murphy in Politico predicts Trump will be primaried by moderate competent Republicans such as John Kasich or possibly Mitt Romney during the run up to the 2020 Presidential campaign. But Trump will prevail among his base and rupture all that ties the GOP together.  He will lose the national contest because Conservatives with real ideology and honor will split off, most logically to the Libertarian Party whose last two candidates in 2016 where successful Republican Governors, Gary Johnson of New Mexico and William Weld of Massachusetts.  The pieces will reassemble back to a two party system, Democrat and Libertarian, and the Grand Old Party withers off just as the Whig party from which it descended did in 1856.