"Has the NSA spied, or is the NSA currently spying, on members of Congress or other elected officials?" That's the question Sen. Bernie Sanders (I-Vt.) put to the National Security Agency's chief in a bluntly worded letter Friday. It seems, however, that the agency cannot categorically say no. Sanders didn't use the word "spy" lightly. He was careful to define his terms, indicating he meant the collection of phone records from personal as well as official telephones, "content from Web sites visited or e-mails sent," and data that companies collect but don't release to the public.