What is Fisa, and what does it mean for no-warrant spying?

News Snapshot:

Congress spent the past week in a fractious debate over a major government surveillance program that gives US authorities the ability to monitor vast swaths of emails, text messages and phone calls without a warrant. In a vote on Friday, lawmakers ultimately decided to keep that warrantless surveillance intact and passed a two-year reauthorization of the law, known as section 702 of the Foreign Intelligence Surveillance Act, or Fisa. The law has long been contentious among both progressives and libertarian-leaning conservatives who view it as a violation of privacy rights and civil liberties. Donald Trump has likewise lambasted it out...