Welcome to Infomercial America, or, if you prefer, the United States of Spam. Whenever political conspiracy theories break out into the open, pundits and intellectuals name-check the brilliant but flawed essay "The Paranoid Style in American Politics" by Richard Hofstadter. Under President George W. Bush, the "9/11 Truthers" were the poster boys and girls of the paranoid style. Others hinted that the flooding of New Orleans during Hurricane Katrina might have been deliberate. Under President Obama, it was the "Birthers." A related theory was that Obama is a secret Muslim. A generation before that, it was the John Birch Society...