US President Donald Trump has sacked Secretary of State Rex Tillerson, replacing him with the director of the CIA, Mike Pompeo.
Mr Trump thanking Mr Tillerson for his service on Twitter, said the new state secretary would do a fantastic job.
Mr Tillerson, a former chief executive of ExxonMobil, was only appointed to the job just over a year ago.
The president also nominated Gina Haspel to become the first woman director of the CIA.
Reports have swirled of a schism in the Trump administration between the commander-in-chief and his top diplomat, as the US faces a host of vexatious foreign policy conundrums, from North Korea to Iran.
Last October Mr Tillerson was forced to convene a news conference to deny reports that he was considering quitting, though he did not comment on a report that he had called his boss a moron after a meeting last July at the Pentagon.
Last autumn, Mr Trump publicly undercut the former Texas oilman by tweeting that he was wasting his time trying to negotiate with nuclear-armed North Korea.
Mr Tillerson was reported to be astonished at how little Mr Trump grasped the basics of foreign policy.
The New York Times quoted sources as saying Mr Trump was irritated by Mr Tillerson’s body language during meetings.
Mr Tillerson was said to roll his eyes or slouch when he disagreed with the decisions of his boss.