In a vacuum there’s nothing newsy about this, but 2012 isn’t a vacuum. We’ve talked before about the developing narrative: Palin vs. anti-Palin, “true conservatives” vs. centrists, blue-collar vs. white-collar, and … populists vs. “elitists.” With Beck having brought down the house at CPAC and the GOP in the grip of tea party fee-vah, why oh why would a potential nominee spritz cold water on populism? Branding, dear boy, branding: As Mitt Romney sets out this week to promote his new book, “No Apology,’’ he is also auditioning for a rapidly disappearing role in American politics: a politician who is...