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Italy's former President, Giorgio Napolitano (C) surrounded by Italian senators, deputies and representatives of the regions -- members of the electoral college -- applauds Sicilian judge Sergio Mattarella, newly elected Italian president, on January 31, 2015, at the Parliament in Rome. Renzi's backing for Mattarella has been interpreted as the end of a temporary alliance the premier forged with disgraced former prime minister Silvio Berlusconi to help drive labour market and electoral reforms through parliament. Mattarella is seen as an "anti-Berlusconi" figure, having severed his ties with the centre right in Italian politics partly because of his distaste for the media tycoon, who still heads the opposition Forza Italia party despite a tax fraud conviction. AFP PHOTO / ANDREAS SOLARO (Photo credit should read ANDREAS SOLARO/AFP/Getty Images)

Italy's former President, Giorgio Napolitano (C) surrounded by Italian senators, deputies and representatives of the regions -- members of the electoral college -- applauds Sicilian judge Sergio Mattarella, newly elected Italian president, on January 31, 2015, at the Parliament in Rome. Renzi's backing for Mattarella has been interpreted as the end of a temporary alliance the premier forged with disgraced former prime minister Silvio Berlusconi to help drive labour market and electoral reforms through parliament. Mattarella is seen as an "anti-Berlusconi" figure, having severed his ties with the centre right in Italian politics partly because of his distaste for the media tycoon, who still heads the opposition Forza Italia party despite a tax fraud conviction. AFP PHOTO / ANDREAS SOLARO (Photo credit should read ANDREAS SOLARO/AFP/Getty Images)
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ROME, ITALY - MARCH 15: A general view during the Italian Parliament inaugural session at Senate on March 15, 2013 in Rome, Italy. The new Italian parliament, which opens the 17th Legislature, has the task of electing the President of the House of Parliament and of the Senate, before giving way to a new government. Pier Luigi Bersani, leader of the Democratic Party, asked his senators and representatives to vote blank votes with the intent to continue to work on an agreement with the Five Stars Movement (M5S) who have said it will vote only for its candidates for the presidency of House of Parliament and the Senate. (Photo by Elisabetta Villa/Getty Images)

ROME, ITALY - MARCH 15: A general view during the Italian Parliament inaugural session at Senate on March 15, 2013 in Rome, Italy. The new Italian parliament, which opens the 17th Legislature, has the task of electing the President of the House of Parliament and of the Senate, before giving way to a new government. Pier Luigi Bersani, leader of the Democratic Party, asked his senators and representatives to vote blank votes with the intent to continue to work on an agreement with the Five Stars Movement (M5S) who have said it will vote only for its candidates for the presidency of House of Parliament and the Senate. (Photo by Elisabetta Villa/Getty Images)
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ROME, ITALY - NOVEMBER 27: Senators of the PDL Party (center-right) protest for the votes procedure over Silvio Berlusconi's Parliament expulsion at the Italian Senate, Palazzo Madama on November 27, 2013 in Rome, Italy. The Italian Senate has today voted to expel former Prime Minister Silvio Berlsuconi from parliament after his recent conviction over tax fraud. (Photo by Franco Origlia/Getty Images)

ROME, ITALY - NOVEMBER 27: Senators of the PDL Party (center-right) protest for the votes procedure over Silvio Berlusconi's Parliament expulsion at the Italian Senate, Palazzo Madama on November 27, 2013 in Rome, Italy. The Italian Senate has today voted to expel former Prime Minister Silvio Berlsuconi from parliament after his recent conviction over tax fraud. (Photo by Franco Origlia/Getty Images)
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Italys' Prime Minister Enrico Letta (2ndL) shakes hands with Interior Minister Angelino Alfano after his speech at the lower house of Parliament on October 2, 2013 in Rome. Italy's former Prime Minister Silvio Berlusconi abandoned his bid to topple the government today, voting for a confidence vote in a humiliating climbdown after key allies rebelled against his leadership. AFP PHOTO / ANDREAS SOLARO (Photo credit should read ANDREAS SOLARO/AFP/Getty Images)

Italys' Prime Minister Enrico Letta (2ndL) shakes hands with Interior Minister Angelino Alfano after his speech at the lower house of Parliament on October 2, 2013 in Rome. Italy's former Prime Minister Silvio Berlusconi abandoned his bid to topple the government today, voting for a confidence vote in a humiliating climbdown after key allies rebelled against his leadership. AFP PHOTO / ANDREAS SOLARO (Photo credit should read ANDREAS SOLARO/AFP/Getty Images)
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ROME, ITALY - FEBRUARY 24: A voter casts his ballot at a polling station on February 24, 2013 in Rome, Italy. Italians are heading to the polls today to vote in the elections, as the country remains in the grip of economic problems . Pier Luigi Bersani's centre-left alliance is believed to be a few points ahead of the centre-right bloc led by ex-Prime Minister Silvio Berlusconi. (Photo by Giorgio Cosulich/Getty Images)

ROME, ITALY - FEBRUARY 24: A voter casts his ballot at a polling station on February 24, 2013 in Rome, Italy. Italians are heading to the polls today to vote in the elections, as the country remains in the grip of economic problems . Pier Luigi Bersani's centre-left alliance is believed to be a few points ahead of the centre-right bloc led by ex-Prime Minister Silvio Berlusconi. (Photo by Giorgio Cosulich/Getty Images)
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Getty Images News Giorgio Cosulich