Congress is behind on yet more crucial work: If the House and Senate don’t renew it by Monday, a key section of the nation’s key foreign-spying law will expire — blowing a major hole in US national security. A post-9/11 reform, Section 702 of the Foreign Intelligence Surveillance Act, sensibly allows monitoring of a limited number of foreigners , on an individual basis, for limited purposes without requiring a warrant. That lets US agents collect vital info and respond quickly when they unearth