This is politics in 2011: Newt Gingrich is campaigning for Iowa caucus votes in bookstores that aren’t even in the first-to-vote state, Mitt Romney is burnishing his national lead over everyone but Gingrich¬†with a self-deprecating¬†“Top 10 List” on Late Night with David Letterman — and the White House is burning up Twitter in a showdown with House Republicans.