Lies about Honesty

More Krugman. He calls out Feldstein for mistakes in a piece. I agree that Feldstein should admit his errors. However, Krugman ends by saying "if I misstated the facts like this in the Times, I’d be required to publish a correction". Really? How about if he claimed in a column that Herbert Hoover cut government spending during the Great Depression?
(added link to my original post on the column)