On his radio talk show last Friday, dittohead in chief Rush Limbaugh was working himself into quite a lather. The subject? Immigration reform, specifically the controversial immigration bill now before the Senate -- or, as Limbaugh dubbed it, the Comprehensive Destroy the Republican Party Act. Though Limbaugh pummeled his usual targets on the left, complaining that the current immigration reform proposal was yet another Ted Kennedy-led scheme to destroy America, Limbaugh was also unsparing toward national Republicans: At the end of the day here, what we're talking about is the marginalization, if not the destruction, of the Republican Party. Look,...