FILE PHOTO: U.S. Senate Intelligence Committee Vice Chair Mark Warner (D-VA) talks during an interview with Reuters on Capitol Hill in Washington, DC, U.S., January 5, 2018. Picture taken on January 5, 2018 . REUTERS/Carlos Barria
FILE PHOTO: U.S. Senate Intelligence Committee Vice Chair Mark Warner (D-VA) talks during an interview with Reuters on Capitol Hill in Washington, DC, U.S., January 5, 2018. Picture taken on January 5, 2018 . REUTERS/Carlos Barria