Shape-shifting Shiite cleric Moqtada Al Sadr has emerged as a potential king-maker after his bloc won a plurality of seats in Iraq's general elections. Karim Kadim / AP Photo
Shape-shifting Shiite cleric Moqtada Al Sadr has emerged as a potential king-maker after his bloc won a plurality of seats in Iraq's general elections. Karim Kadim / AP Photo

Who is Moqtada Al Sadr?