NEW : Violence erupts along a main commercial street . NEW : Protesters set fires , throw bottles and rocks . NEW : Police fire tear gas to disperse the crowd. Foremost among them , Berlusconi faces a difficult economic picture as he looks ahead to the rest of his term , which expires in 2013 . Berlusconi survived by a narrow margin after the vote .
NEW : Violence erupts along a main commercial street . NEW : Protesters set fires , throw bottles and rocks . NEW : Police fire tear gas to disperse the crowd. Berlusconi survived by a narrow margin after the vote .