washington u.s. senate majority leader mitch mcconnell set vote late monday expand federal bureau investigation authority use secretive surveillance order without warrant include email metadata browse history information move make via amendment criminal justice appropriations bill effort senate republicans respond last week mass shoot orlando nightclub series measure restrict gun offer party fail monday wake tragic massacre orlando important law enforcement tool need conduct counterterrorism investigations senator john mccain arizona republican sponsor amendment say statement bill also support republican senators john cornyn jeff sessions richard burr chair senate intelligence committee privacy advocate denounce effort say seek exploit mass shoot order expand government digital spy power senator ron wyden oregon democrat criticize similar effort last month one take hatchet important protections americans liberty amendment would broaden fbi authority use so-called national security letter include electronic communications transaction record time stamp email email senders recipients obama administration years lobby change nsls use 2008 legal memo justice department say law limit largely phone bill record fbi director jam comey say change essentially correct typo top legislative priority agency nsls require warrant almost always accompany gag order prevent service provider share request target user letter exist since 1970s though scope frequency use expand greatly sept. 11 2001 attack unite state amendment file monday would also make permanent provision usa patriot act allow intelligence community conduct surveillance lone wolf suspect confirm tie foreign terrorist group provision justice department say last year never use currently set expire december 2019. vote expect late wednesday mcconnell office say invoke orlando senate republicans set vote expand fbi spy