LISBON, March 10, 2024 (BSS/AFP) - Voters in Portugal go to the polls Sunday in an early election that could see the country join a shift to the right seen across Europe after eight years of Socialist rule.

Final opinion polls published Friday show the centre-right Democratic Alliance (AD) narrowly ahead of the Socialist Party (PS) but short of an outright majority in parliament, which could make the far-right party Chega a kingmaker for forming a governing coalition.

But analysts warned the results of the election, Portugal's second in two years, remained wide open given the large number of undecided voters.

Voting stations in the nation of around 10 million people open at 8:00 am (0800 GMT) with exit poll projections expected at 8:00 pm.

The AD leader, 51-year-old lawyer Luis Montenegro, has campaigned on promises to boost economic growth by cutting taxes, and to improve the country's public services.

"We really must turn the page," he told a packed final rally at Lisbon's bullring on Friday night.

Montenegro has ruled out any post-election agreement with Chega, but other top AD officials have been more ambiguous.

Analysts say a deal with the anti-establishment Chega, which means "Enough", may prove the only way for the AD to govern.

Chega's leader Andre Ventura, a former trainee priest who went on to become a tough-talking television football commentator, has said his party is "as legitimate as the others".

Chega calls for tougher measures to fight corruption, stricter controls over immigration and chemical castration for some sex offenders.

Just five years old, Chega picked up its first seat in Portugal's 230-seat parliament in 2019, becoming the first far-right party to win representation in the assembly since a military coup in 1974 toppled a decades-long right-wing dictatorship.

It increased its seats to 12 seats in 2022 and polls suggest it could more than double that number this time.

That would mirror gains by far-right parties across Europe, where they already govern -- often in coalition -- in countries such as Italy, Hungary or Slovakia, or are steadily gaining, as in France and Germany.

- 'Change direction' -

The election was called after Socialist Prime Minister Antonio Costa, 62, unexpectedly resigned in November following an influence-peddling probe that involved a search of his official residence and the arrest of his chief of staff.

Though Costa himself was not accused of any crime, he decided not to run again.

Under his watch unemployment has dropped, the economy expanded by 2.3 percent last year -- one of the fastest rates in the eurozone -- and public finances have improved.

But surveys indicate many voters feel Costa's government squandered the outright majority it won in 2022 by failing to improve unreliable public health services and education, or address a housing crisis that has sparked large street protests in what remains one of Western Europe's poorest countries.

"We need to change the direction of the country because it can't continue in this state," Antonio Ferreira, a 47-year-old telecoms technician and volunteer firefighter, told AFP at an AD street rally Friday in Lisbon's upscale Alvalade neighbourhood.

The Socialists' new leader, 46-year-old former infrastructure minister Pedro Nuno Santos, has defended the government's record even as he acknowledges it could have done better in some areas.

"The right thinks they're going to win the election with their usual arrogance and lack of humility. It's the Portuguese people who will decide," he said at his final rally on Friday night.