After Politico reported that Washington Post reporter Barton Gellman says he's been told his telephone records were obtained by a national security letter, Julian Sanchez posted on Just Security that there at least two ways in which a national security letter would appear to strain the limits of the authority from the only NSL statute allowing for access to telecommunications records.
"First, §2709 may only be used in connection with an 'authorized investigation to protect against international terrorism or clandestine intelligence activities,'" Sanchez writes. "Assuming Bart is not suspected of plotting to blow up any airplanes, it seems probable that we’re dealing here with an investigation of leaks of classified information to press. Yet such leaks—even when they clearly involve a violation of the law—do not obviously satisfy the traditional definition of 'clandestine intelligence activities.'"
Second, Sanchez writes, "a clause added to the NSL provisions by the USA Patriot Act—to compensate for the elimination of the requirement that NSLs target suspected agents of a foreign power—provides that they may be used for an authorized investigation 'provided that such an investigation of a United States person is not conducted solely on the basis of activities protected by the first amendment to the Constitution of the United States.' The sole basis for seeking Gellman’s records would, of course, be his First Amendment–protected newsgathering and reporting activities."