Mahmoud Abbas (; born 15 November 1935), also known by the kunya Abu Mazen (, ), is the president of the State of Palestine and Palestinian National Authority. He has been the chairman of the Palestine Liberation Organization (PLO) since 11 November 2004, and Palestinian president since 15 January 2005 (Palestinian National Authority since 15 January 2005, and State of Palestine since 8 May 2005). Abbas is a member of the Fatah party and was elected chairman of Fatah in 2009.