 Some of those United Opposition members who were repentant were later rehabilitated and returned to government.Stalin was now the party's supreme leader, although he was not the head of government, a task he entrusted to 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.