https://www.theregister.co.uk/2018/01/16/us_senate_s702_fisa_filibuster/

A number of US senators from both sides of the aisle have said they will filibuster an effort to approve the continuation of a controversial American government spying program.

This mass snooping effort was authorized by section 702 of the FISA (Foreign Intelligence Surveillance Act) Amendments Act, which expired at the end of last year, and the NSA wants it renewed with a new law passed. Section 702 is supposed to allow Uncle Sam's g-men to keep close tabs on non-Americans abroad.