Italy’s Parliament failed to elect a new state president in the first two votes yesterday, with a centre-left rebellion against leader Pier Luigi Bersani torpedoing his official candidate and prolonging political stalemate.

Until the new president is elected, the paralysis hobbling attempts to form a government since February’s inconclusive general election will continue but a chaotic day of voting yesterday showed how fractured the political landscape remains.

Bersani’s candidate Franco Marini, a former Senate speaker, fell far short of the required two-thirds majority of the 1,007 electors in the first vote and in the second he won no votes at all, with many members of both centre-left and centre-right blocs casting blank ballots.

Political sources said the casting of blank ballots was intended to protect Marini from further humiliation after a centre-left rebellion against his candidacy made it impossible to win the two thirds majority of electors from both houses of Parliament plus regional representatives.

Marini’s failure, in a vote which is key to filling a government vacuum since the deadlocked general election in February, was a slap in the face for Bersani. He badly split his party by nominating Marini in a deal with centre-right boss Silvio Berlusconi.

Bersani told reporters he would meet the centre-left electors to decide their next move ahead of a third vote today.

After that vote, a simple majority is required to elect a new president.

Bersani said he needed to accept that the election had entered “a new phase”, indicating Marini, 80, would be dropped as a deeply divisive candidate.

The centre-left would make a new proposal for the presidential election, he said.

Many rebellious centre-left parliamentarians voted in the secret ballot for academic Stefano Rodota, candidate of the populist 5-Star Movement of former comic Beppe Grillo.

Nichi Vendola, head of Bersani’s leftist ally SEL, said nominating Marini was a mistake.

“Marini was a candidate who united the centre right, not the centre left,” he said.

He said unless things changed, his 46 representatives would keep voting for Rodota. Marini’s failure could wreck Bersani’s deal with Berlusconi, which is aimed at helping him form a minority government.

Bersani has repeatedly refused to agree to Berlusconi’s demands that they form a broad coalition together. But it is widely believed he wants to parley an agreement on the presidency with centre-right willingness to support a minority centre-left government.

The vote for a successor to President Giorgio Napolitano, whose term ends on May 15, is a crucial step towards resolving the stalemate since an inconclusive election in February.

However the choice of Marini provoked fury in Bersani’s Democratic Party and an open revolt by his rival, Matteo Renzi, the 38-year-old mayor of Florence.

Renzi had described the 80-year-old Marini as “a candidate from the last century” who had no charisma or international standing,