Senate intelligence committee vice chairman Sen. Mark Warner, D-Va., (left) and chairman Sen. Richard Burr, R-N.C., confer after hearing testimony from intelligence officials, including the heads of the FBI, CIA and NSA on Capitol Hill February 13, 2018.

Senate intelligence committee vice chairman Sen. Mark Warner, D-Va., (left) and chairman Sen. Richard Burr, R-N.C., confer after hearing testimony from intelligence officials, including the heads of the FBI, CIA and NSA on Capitol Hill February 13, 2018.