While some speculated that Medvedev might run for a second term, he announced in September 2011 that he and Putin would—pending a United Russia victory at the polls—trade positions. Widespread irregularities in parliamentary elections in December 2011 triggered a wave of popular protest, and Putin faced a surprisingly strong opposition movement in the presidential race. On March 4, 2012, however, Putin was elected to a third term as Russia’s president. In advance of his inauguration, Putin resigned as United Russia chairman, handing control of the party to Medvedev. He was inaugurated as president on May 7, 2012, and one of his first acts upon assuming office was to nominate Medvedev to serve as prime minister.