Vitali Klitschko would run in the 2012 Kiev mayoral election. During the 2012 Ukrainian parliamentary election, Klitschko was elected (he was top candidate on UDAR's party list) into the Ukrainian parliament; when his party won 40 seats. Klitschko was chosen the leader of the party's faction in Parliament. Klitschko announced on 24 October 2013 that he intended to take part in the next Ukrainian presidential election that was then set for 2015. Experts and lawyers then argued that it was unclear if Klitschko could take part in these elections. Under Ukrainian law, a presidential candidate must have had his residence in Ukraine
Vitali Klitschko leader. In the 2015 Kiev Mayoral election Klitschko was reelected with 66.5% of vote. For this he needed a second round of Mayoral elections between him and Boryslav Bereza after incumbent Klitschko scored 40.5% of the vote and Bereza 8.8% in the first round. (Bereza gained 33.51% of the vote in the second round of Mayoral elections.) Klitschko resigned as Petro Poroshenko Bloc chairman (on 26 May) after a new law barring a head of administration to be chairman or a member of a political party took effect on 1 May 2016. Klitschko is in favor of the Association Agreement