Earlier quoted context omitted.
Unless they're breaking the law, the NSA still needs a warrant to request data if you're an American citizen. If you're the subject of an active investigation, law enforcement and spy agencies alike tend not to tell you that and are under no obligation to disclose anything. If the investigation is closed, then you can request data under a general FOIA request, but you'd have to know there was an investigation about y…
> You may or may not believe the NSA actually complies with the law If you believe that they do, I've got a bridge to sell you. Congress is entirely derelict in their duties of holding them accountable, and has been for a very long time.
>FISA specifies two documents for the authorization of surveillance. First, FISA allows the Justice Department to obtain warrants from the Foreign Intelligence Surveillance Court (FISC) before or up to 72 hours after the beginning of the surveillance. FISA authorizes a FISC judge to issue a warrant if "there is probable cause to believe that ... the target of the electronic surveillance is a foreign power or an agent of a foreign power." 50 U.S.C. § 1805(a)(3).
Emphasis mine.