As Wired reported last June:
The surveillance experts at the National Security Agency won't tell two powerful United States Senators how many Americans have had their communications picked up by the agency as part of its sweeping new counterterrorism powers. The reason: it would violate your privacy to say so.
That claim comes in a short letter sent Monday to civil libertarian Senators Ron Wyden and Mark Udall. The two members of the Senate's intelligence oversight committee asked the NSA a simple question last month: under the broad powers granted in 2008′s expansion of the Foreign Intelligence Surveillance Act, how many persons inside the United States have been spied upon by the NSA?
The query bounced around the intelligence bureaucracy until it reached I. Charles McCullough, the Inspector General of the Office of the Director of National Intelligence, the nominal head of the 16 U.S. spy agencies. In a letter acquired by Danger Room, McCullough told the senators that the NSA inspector general "and NSA leadership agreed that an IG review of the sort suggested would itself violate the privacy of U.S. persons," McCullough wrote.
In other words, the NSA is sending the same message to both the American people and their representatives in Congress: f@ck off.