U.S. President-elect Donald Trump said on Saturday he was picking Richard Grenell, his former intelligence chief, as presidential envoy for special missions, a post where he will likely drive policies toward some U.

President-elect Donald Trump announced Saturday that he's picked longtime foreign policy adviser Richard Grenell to serve as an envoy for special missions, tasking him with helping the incoming administration deal with some of the toughest foreign policy challenges.

A combative loyalist and the president-elect’s former ambassador to Germany, Mr. Grenell had hoped to be secretary of state.