||1:The snag is that Mr Monti’s real adversary would not be Mr Berlusconi, but the leader of the PD, Pier Luigi Bersani, who has pointedly warned the prime minister to stay out of the fray.||2:Without exception, the polls show the PD and its allies with a substantial lead.||3:Under Italy’s electoral rules, whichever coalition comes first receives a bonus that guarantees it a majority in the Chamber of Deputies.||4:But in the Senate the bonus is allocated region by region.||5:The big risk for the governability of Italy after the election is a result that gives a coalition a majority in the chamber, but not in the Senate.