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
Mayor of Kiev mayor of Kiev Leonid Chernovetsky of the office of Head of Kiev City Administration, while still preserving the post of mayor. This led to Chernovetsky being deprived of any official decision-making role and most power in the capital was handed over to the Head of Kiev City Administration. At that time that was Oleksandr Popov who was appointed by President Viktor Yanukovych on 16 November 2010. Before these amendments, the elected mayor of the Kiev City Council was automatically appointed also as head of the Kiev City City Administration. Chernovetsky was not seen in Kiev for several months after Popov's