Former comedian says he will not back Democratic party and brands leader a 'dead man talking'Italy's political deadlock deepened on Wednesday as Beppe Grillo, the ex-comedian whose Five Star Movement broke through in spectacular style at the polls, ruled out backing a government led by the centre left and branded its leader a "dead man talking" who should quit.Grillo unleashed a characteristic tirade of insults on Pier Luigi Bersani, leader of the Democratic party (PD), who on Tuesday extended an olive branch to M5S in a bid to create a reformist government.