"The broad problem is a familiar one: the NSA is using foreign surveillance systems to spy on Americans. The FISA Act was meant for targeting non-US citizens, just like the NSA was meant to collect foreign intelligence — but those restrictions have become almost meaningless. As the NSA sweeps up emails and web traffic in bulk, countless Americans end up in the agency database. (Literally countless: the NSA refuses to give Congress even a broad estimate.) All that’s needed to search the database is a rubber stamp approval from the FISA court."