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 Ukraine the Ukrainian parliament on 22 February voted to remove Yanukovych from power (on the grounds that his whereabouts were unknown and he thus could not fulfil his duties), and to free Yulia Tymoshenko from prison. The same day Yanukovych supporter Volodymyr Rybak resigned as speaker of the Parliament, and was replaced by Tymoshenko loyalist Oleksandr Turchynov, who was subsequently installed as interim President. Yanukovych had fled Kiev, and subsequently gave a press conference in the Russian city of Rostov-on-Don. In March 2014, the Annexation of Crimea by the Russian Federation resulted in Crimea being annexed by Russia. Though official results