lol @ believing the GOP to be some sort of sentient entity with the ability to tell certain constituencies to "get lost"
Things would similarly be much easier for the Democrats if they likewise told the animal rights activists and welfare queens to "get lost" haha
I'm think of a presidential candidate supported by the leadership strongly sending the message "we don't want your vote". The first election would look like this most likely, but then what?
That's just....not how politics work, for a couple reasons
1) What Republican candidate in their right mind would
want to abandon Southern Whites? After 2014, a majority of the GOP House Caucus is from the South and Romney won 73% of Southern Whites in 2012. Its not the GOP that is driving the South, the South is driving the GOP. No GOP candidate would
ever be able to become a serious contender for the GOP nomination without a healthy amount of Southern support.
2) You don't get to pick your supporters. Simply telling "White racists" to "not vote for you" doesn't change the fact that those voters are still more closely aligned with the Republican platform than they are with the Democrats'. The only way to achieve some sort of mass Southern exodus from the GOP would require some pretty significant shifts in the GOP platform which don't seem likely because a) political parties are extremely weak in the United States compared to most of the developed world, and Republican candidates do more to mold the party platform than the party apparatus and, b) Southern Whites form such a significant portion of the GOP base that any substantial changes in the GOP platform are unlikely to occur without the South having quite a few, big seats at the table in such discussion.