Washington — A key surveillance tool that lets the government collect foreign intelligence without a warrant is again at the brink of expiration. Barring an 11th-hour intervention, the spy authority, known as Section 702 of the Foreign Intelligence Surveillance Act, is set to lapse at 12 a.m. Saturday after President Trump's pick to oversee the nation's intelligence agencies complicated its renewal. Democrats have opposed extending the authority since the president announced that he had