President of Ukraine by acting president Oleksandr Turchynov, who then also served as Chairman of the Ukrainian Parliament, on 21 February 2014. Oleksandr Turchynov was the only acting president in Ukraine's modern history. Unlike in the US, where the vice president immediately receives all powers of the presidency upon assumption of the presidential office, in Ukraine the powers of an acting president are severely limited. On 18 June 2015, Yanukovych was officially deprived of the title of president of Ukraine. The current president is Petro Poroshenko who took the oath of office on 7 June 2014. The Government of Ukraine utilizes a Semi-presidential
History of Crimea in the aftermath of the Euromaidan revolution. On 21 February, President Viktor Yanukovych agreed to a three-party memorandum that would have kept him in office until the end of the year. Within 24 hours the agreement was broken by the Maidan-activists and the president was forced to flee. He was dismissed the following day by a rump Verkhovna Rada, the legislature elected in 2012, and the Government he dismissed was replaced by a non-elected, illegal "Government", contrary to the Constitution. In the absence of a president, the newly appointed Speaker of the legislature, Oleksandr Turchynov, became acting President with limited