Hey, I just made a post about this the other day! https://lemm.ee/post/39037973
TL;DR: in every state except Nebraska and Maine, the popular vote determines the electoral college vote for the state. So no matter how badly gerrymandered the districts are, the presidential candidate elected by the state is NOT affected!
It’s probably because it’s a city that has a large enough venue to host nearby rural folks who are his target demographic. If I had to guess, it will have low local attendance and the audience will largely be made up of people whining about Asheville and its residents.