Italian Prime Minister Matteo Renzi's centre-left Democratic Party (PD) is headed for a stunning victory ahead of the anti-establishment Five Star Movement (M5S) in the European Parliament elections.
The PD won 41.4 per cent against 22.4 per cent for the M5S and 15.7 per cent for former prime minister Silvio Berlusconi's Forza Italia party, according to a projection based on 20 per cent of Sunday's ballots counted.
"This would make the PD the biggest party among European socialists and democrats," Deborah Serracchiani, deputy head of the party, said at a press briefing at its headquarters in Rome.
"This is extraordinary both for the party both on an EU level and on a government level," she said, comparing the apparent score to the strong showing by German Chancellor Angela Merkel's ruling CDU party.
"It means that people have understood what the government is doing with the reforms," she said.
Stefano Menichini, editor of the leftist Europa daily, said: "The Party of European Socialists will have to look to Italy for a lead after their defeat".
Grillo's "political bet of weakening the Democratic Party has failed", he said.
An exit poll conducted by Piepoli Coesis for the ANSA news agency showed the PD scoring between 29.5 and 32.5 per cent, compared to firebrand ex-comedian Beppe Grillo's M5S with 25 to 28 per cent.
The Forza Italia party of Berlusconi, who has been booted out of parliament for a tax fraud conviction and was banned from voting or running as a result of the criminal case, got 18 to 20 per cent in the poll.
Another poll by the Emg Institute gave the PD 34.5 per cent, M5S 25.5 per cent and Forza Italia 17 per cent. In a third poll by IPR Marketing, the PD scored 30.5-33, M5S 26-29 and Forza Italia 16.5-19.5.
The elections were being seen as an important electoral test for Renzi's government, which was installed after he ousted his centre-left predecessor Enrico Letta earlier this year without an election.
Grillo's party, which has campaigned against political perks in Italy and garnered a quarter of the vote in last year's general election, will be joining the European Parliament for the first time.
It has called for a referendum on euro membership and for the scrapping of EU debt reduction targets.
Turnout in Italy was given at around 56 per cent with more than half of ballots counted - compared to 65.64 per cent in the last European Parliament elections.
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