As a Northerner, I’ve hear a lot how those who moved ruined some states. And I believe it.
But did it have an effect on South Carolina? Would McCain possibly have won the primary because the republicans that moved down there are a little less conservative?
The factor you’re looking for is SC’s open primary system, where Democrats vote in the GOP primary in game-changing numbers because Democratic nominees never win here.
Creates a perverse situation where Republicans only partially determine the Republican nominee.
Many have identified the problem quite clearly... the question is will it ever change, I don’t know.