Soon after Medvedev won the March 2008 presidential election by a landslide, Putin announced that he had accepted the position of chairman of the United Russia party. Confirming widespread expectations, Medvedev nominated Putin as the country’s prime minister within hours of taking office on May 7, 2008. Russia’s parliament confirmed the appointment the following day. Although Medvedev grew more assertive as his term progressed, Putin was still regarded as the main power within the Kremlin.