Paul Krugman is back to discussing income inequality on his blog, following a very negative reaction to his disgraceful column on the Tucson shootings, in which he led a left wing chorus arguing that Gabrielle Giffords was brought down by a gunman undoubtedly influenced by Arizona's climate of hate, engendered by talk radio, Sarah Palin, Fox News, and other assorted villains on the right. Krugman writes for the New York Times, and the paper's editorial on the mass murder doubled down on Krugman's obnoxious take on the event. Charles Krauthammer did the best, and hopefully lasting damage to Krugman's already...