theguardian.com/uk-news/2017/a…
"Notwithstanding any other law, the President, through the Attorney General, may authorize electronic surveillance without a court order under this subchapter to acquire foreign intelligence information for periods of up to one year."
law.cornell.edu/uscode/text/50…
intelligence.senate.gov/about/committe…
en.wikipedia.org/wiki/United_St…
law.cornell.edu/uscode/text/50…