Frustration is mounting among leading foreign policy officials in U.S. President Donald Trump's administration as they chafe at some policy and bureaucratic defeats and complain they lack independence to do their jobs, officials say.

The clash between internationalists urging the traditional U.S. leadership role in the world and advocates of an "America First" approach has worn down foreign policy and intelligence professionals inside the government, according to the officials.

Secretary of State Rex Tillerson has told friends he will be lucky to last a year in his job, according to a friend, while two officials said national security adviser H.R. McMaster was frustrated by what he sees as disorganization and indiscipline on key policy issues inside the White House.