In a social media post on Wednesday afternoon, former President Donald Trump delivered an all-caps message to members of Congress. "KILL FISA," he wrote. "IT WAS ILLEGALLY USED AGAINST ME, AND MANY OTHERS."
Trump was referring to Section 702 of the Foreign Intelligence Surveillance Act (FISA), which allows intelligence services to scoop up electronic communications between Americans and individuals overseas. Those communications are stored in a massive database—the true extent of which is unknown and perhaps unquantifiable—that is routinely queried by the FBI and other law enforcement agencies, giving them a back door to spy on Americans' communications without a warrant.
