This past year I registered as a Republican in an attempt to get John Kasich nominated, since I figured a Kasich-Hillary matchup wouldn't be radioactive for American democracy. I changed registration after Trump got nominated, because I wasn't going to be associated with such an organization, but if there is a serious challenge to Trump from within the GOP in 2020 by, say, freshman Senator Evan McMullin of Utah, I would consider crossing back over and ousting Trump. Any change this could be a thing?