As of 2015, Bern's City Council is made up of two representatives of the SP (<answer>Social Democratic Party</answer>, of whom one is also the mayor), and one each of CVP (Christian Democratic Party), GB (Green Alliance of Berne), and FDP (FDP.The Liberals), giving the left parties a majority of three out of five seats. The last election was held on 25 November 2012.
What party also had the mayor as of 2015?
Social Democratic Party