His critics say the move will make him increasingly authoritarian. Outgoing Foreign Minister Ahmet Davutoglu is set to be PM after being elected head of the governing AK Party. Under the constitution, Mr Erdogan must cut his ties to the AK Party once he becomes president. At the party’s congress on Wednesday he made his last speech as leader, saying: “What is changing today is the form, not the essence. The mission which our party has assumed, the spirit of its cause, its goals and ideals are not changing.” Mr Davutoglu was the only candidate to replace Mr Erdogan. In his speech, he said Turkey needed a new constitution, which...