MARK TAPSCOTT: Paranoia 2011: Beware of the Koch behind every bush. “William F. Buckley Jr. struck a blow for reason and truth when in 1962 as National Review editor he effectively excommunicated John Birch Society founder Robert Welch from the conservative movement. . . . Is there a liberal editor today willing to do for the Left what conservative Buckley did decades ago for the Right?”

UPDATE: Professor Jacobson: The Paranoid Style of Politics In Madison and The Left-Blogosphere.