Reply #1: Also, check dailykos [View All]

Gonzales: Congress Gave President The Authority To Spy On Americans
by georgia10

Mon Dec 19, 2005 at 07:06:49 AM PDT
In this morning's interview with Katie Couric on the Today show, Couric asked Attorney General Alberto Gonzales what authorized the President to conduct warrantless spying on Americans. Gonzales trotted out the "inherent authority" excuse, one that has been effectively shattered by Armando here and here. But then he also said that the President also was authorized by Congress to commit this act. Specifically, he said that Bush was granted this power under the authorization for war. I presume he was talking about the Authorization for War passed on September 14, 2001.

Having scoured the authorization (read it here) I can't find anything that would grant the President the power to skirt the Foreign Intelligence Surveillance Act.

http://www.dailykos.com/