Since 2005, both the Conservative Party and the Progress Party have won numerous seats in the Parliament, but not sufficient in the 2009 general election to overthrow the coalition. Commentators have pointed to the poor co-operation between the opposition parties, including the Liberals and the Christian Democrats. Jens Stoltenberg, the leader of the Labour Party, continued to have the necessary majority through his multi-party alliance to continue as PM until 2013.