Answer
Vitali Klitschko, belonging to the European Solidarity, has held the position of mayor of Kyiv since May 25, 2014.
Vitalii Volodymyrovych Klychko, known as Vitali Klitschko, is a Ukrainian politician and former professional boxer who serves as mayor of Kyiv and head of the Kyiv City State Administration, having held both offices since June 2014.