What is the Fisa law Trump wants extended and why are lawmakers resisting?

What is the Fisa law Trump wants extended and why are lawmakers resisting?28 minutes agoShareSaveAdd as preferred on GoogleNardine SaadGetty ImagesThe US Congress has voted to temporarily extend an expiring law that governs how intelligence agencies can gather information from US telecom companies.While the Foreign Intelligence Surveillance Act (Fisa) went decades without controversy, the 1978 law in recent years has angered lawmakers of both parties over how it handles digital communications.A part of the law known as Section 702 gives the National Security Agency (NSA) authority to ​spy on foreigners using data drawn from US digital infrastructure. Critics say the section allows the NSA and agencies it works with, such as the FBI, to mine massive amounts of individuals' information without a warrant.The US House of Representatives and Senate each voted on Friday to extend the law for 10 days, after failing to secure a long-term authorisation - or 'clean extension' - that President Donald Trump has demanded.AFP via Getty ImagesWhat is Fisa?The Foreign Intelligence Surveillance Act of 1978 (Fisa) regulates certain types of foreign intelligence collection and compels the assistance of US telecommunications companies. The Fisa Court established by Congress reviews applications by the US government for approval of electronic surveillance, physical searches and other investigative actions that fall under the law. It ensures the NSA adheres to requirements of both the Fisa law and the US Constitution, whose Fourth Amendment protects individuals from unreasonable searches and seizures.Once it receives authorisations to acquire foreign intelligence information, the NSA often works with law enforcement agencies such as the FBI "to connect the dots between foreign-based actors and their activities in the US", according to to the NSA.What does the Fisa bill do?Attempts to re-authorise the law for five years have recently failed in the US House of Repr...