President Chooses Hard-Liner for 3rd Security Adviser as Shake-Up Continues

National Security Adviser H.R. McMaster sits on the couch as President Donald Trump meets with Crown Prince Mohammad bin Salman of Saudi Arabia in the Oval Office of the White House, March 20, 2018. McMaster will resign and be replaced by John Bolton, a hard-line former United States ambassador to the United Nations, White House officials said Thursday. (Doug Mills/The New York Times)