Stalin was now the party's supreme leader, although he was not the head of government, a task he entrusted to his key ally Vyacheslav Molotov. Other important supporters on the Politburo were Voroshilov, Lazar Kaganovich, and Sergo Ordzhonikidze, with Stalin ensuring his allies ran the various state institutions. According to Montefiore, at this point "Stalin was the leader of the oligarchs but he was far from a dictator". His growing influence was reflected in naming of various locations after him; in June 1924 the Ukrainian mining town of Yuzovka became Stalino, and in April 1925, Tsaritsyn was renamed Stalingrad on the order of Mikhail Kalinin and Avel Enukidze.