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
Viktor Yanukovych Yanukovych first ran for president in 2004: he advanced to the runoff election, and initially defeated his opponent. However, the election was fraught with allegations of fraud and voter intimidation. This caused widespread citizen protests and Kyiv's Independence Square was occupied in what became known as the Orange Revolution. The Ukrainian Supreme Court nullified the runoff election, and ordered a second runoff. Yanukovych lost this second election to Viktor Yushchenko. He served as Prime Minister for a second time from 4 August 2006 to 18 December 2007, under President Yushchenko. Yanukovych was elected President in 2010, defeating Yulia Tymoshenko. The