Josh Marshall has a piece on the fear being felt by the 20% to 25% of the population which sees their "America" slipping away, and becoming more diverse. The Rethuglican / New Confederate Party is in the grip of that segment, which represents the majority of their voters. Here's the situation:
"Yes, [Rep. Steve] King is more intemperate and perhaps more hateful than most. But he speaks for the relatively small slice of the electorate which makes up a pretty big slice of the GOP electorate and keeps the GOP anchored in opposition to immigration reform and to policies which put most of the non-white population off-limits to the party indefinitely. That’s why the whole plan to ‘double down’ on the ‘whites only’ strategy now increasingly favored by Republicans isn’t so much of a strategy as a recognition that it can’t break free or discipline that mammoth part of its voter base."(emphasis added)