We have now the Attorney General of the United States telling Congress that it's not against the law for the President to violate the law if his own Department of Justice says it's not.
It is as brazen a defense of the unitary executive as anything put forward by the Administration in the last seven years, and it comes from an attorney general who was supposed to be not just a more professional, but a more moderate, version of Alberto Gonzales (Thanks to Democrats like Dianne Feinstein and Chuck Schumer for caving on the Mukasey nomination.).
President Bush has now laid down his most aggressive challenge to the very constitutional authority of Congress. It is a naked assertion of executive power. The founders would have called it tyrannical. His cards are now all on the table. This is no bluff.