President Recep Tayyip Erdogan has welcomed the "Yes" vote in the referendum to amend Turkey's constitution and grant the country's presidential office new executive powers. "We have been attacked by other nations of the world. You have seen how the West attacked us," Erdogan told cheering supporters in Istanbul on Sunday. "We have not been divided … We have already been on our way, now we will gear it up [with the new system]," he said. "We have so much work to do in this country." The constitutional changes were backed by Erdogan, the Justice and Development Party (AK Party) founded by him, and the leadership of the Nationalist Action Party (MHP), whose parliamentary support was vital to take the amendments to a public vote.