For the 2007 presidential election , many potential candidates appeared : FranÃ ois Hollande , Laurent Fabius ( who has joined the left-wing of the party ) , Dominique Strauss-Kahn ( who claimed he represented `` social-democracy '' ) , Jack Lang , Martine Aubry and SÃ golÃ ne Royal , who was favorite according to the polls . For the 2007 presidential election , many potential candidates appeared : FranÃ ois Hollande , Laurent Fabius ( from the left-wing of the party ) , Dominique Strauss-Kahn ( who claimed to represent `` social democracy '' ) , Jack Lang , Martine Aubry and SÃ golÃ ne Royal , who was favored according to the polls .