Turkish president warns of efforts to undermine US-Iran deal Turkish President Recep Tayyip Erdogan has told his Iranian counterpart, Masoud Pezeshkian, that Ankara welcomes the agreement between the United States and Iran aimed at ending the US-Israeli war on Iran. During a phone call, Erdogan said it was important to remain vigilant against any attempts to undermine the negotiations, according to the Turkish presidency. He also told Pezeshkian that Türkiye was ready to provide any support needed to help ensure the success of the diplomatic process.