I think it's already a foregone conclusion at this point with respect to the migration. Places like Boise Idaho have already been smacked with the SV stick and their housing market has been a horror show ever sense. The problem won't be the personal politics of the migrants but rather the effects that come from them eating up more resources which the governments in those red states haven't accounted for, especially housing and schools. There's already a strong anti-migrant (or rather anti-Californian migrant) sentiment in places like Colorado and Idaho last time I read up on it. I expect this to get worse and probably cause some strange events (not like personal violence but more political upsets in the coming decades).