Watch out, Alan Grayson: you've got competition when it comes to uttering the ugliest slur on Tea Party Republicans . . . Sure, you've compared them to the Klan. But fellow Dem Steve Cohen has upped the ante. On Steve Kornacki's MSNBC show this morning, Cohen called Tea Party members of congress: "domestic enemies" that congressmen have taken an oath to defend the country against. Kornacki didn't challenge Cohen's libel, managing only to feebly observe that Cohen sounded "pessimistic." Think of it: a congressman has just accused many of his colleagues of treason, and the most you can muster is...