https://www.techdirt.com/articles/20191219/19415943607/second-circuit-says-warrantless-backdoor-searches-nsa-collections-might-violate-fourth-amendment.shtml

The Second Circuit Court of Appeals has suggested -- not exactly ruled -- that backdoor searches of Section 702 collections targeting Americans (citizens and permanent residents) is a violation of the Fourth Amendment.

The case involves Agron Hasbajrami, a lawful permanent resident who was arrested in 2011 as he attempted to board a flight to Turkey. The government claimed Agron -- an Albanian immigrant -- was ultimately headed to Pakistan to join a terrorist organization.