The hard right — which these days is more or less synonymous with the Republican Party — has a modus operandi when it comes to scholars expressing views it dislikes: never mind the substance, go for the smear. And that demand for copies of e-mails is obviously motivated by no more than a hope that it will provide something, anything, that can be used to subject Mr. Cronon to the usual treatment. . . .
Paul Krugman, "William Cronon and the American Thought Police," New York Times, 28 March 2011.