Brian Beutler on why Donald Trump terrifies Republicans:
For almost three years now, Republican strategic thought has been roughly divided between two schools. One, represented by Jeb Bush, Marco Rubio, and to a lesser extent Rand Paul, accepts the notion that the party must improve its performance with minority voters, without sacrificing its command of the white vote, in order to remain competitive in presidential elections. The other, represented by Ted Cruz and Scott Walker, rejects this premise.
These Republicans hew to the theory, expressed numerically by RealClearPolitics analyst Sean Trende, that making inroads with minorities is not important. The key to winning, they believe, lies with activating a large block of the white electorate that has stood on the sidelines, but would find a natural home in a Republican party if it were led by someone who could channel the political mood of the white working class.
So if you are in the former camp and believe reaching out and changing the party is how you win again, then Trump destroys that path by reminding Latinos and everyone else that Republicans are evil racist bigots. If you are in the latter camp and believe the "missing white voter" is the key to keeping the GOP competitive in elections, then you worry that any attack on Trump alienates them. So in essence, Donald Trump is forcing the courageous choice that Republicans should have made after 2012: Either cast off the racist bigoted tea party or die.
If I were a Republican, I would realize that the 2016 election is already lost. I would let Trump and Cruz get the Presidential and Vice Presidential nomination and watch them go down in defeat in an epic landslide. And then I would finally clean house. And it may take a generation, but at least you'd have your party back.