Californicated by the Right?

Paul Krugman makes a disturbing point:

If Tea Party Republicans do win big next year, what has already happened in California could happen at the national level. In California, the G.O.P. has essentially shrunk down to a rump party with no interest in actually governing — but that rump remains big enough to prevent anyone else from dealing with the state’s fiscal crisis. If this happens to America as a whole, as it all too easily could, the country could become effectively ungovernable in the midst of an ongoing economic disaster.