PARIS - Voters resoundingly endorsed President Nicolas Sarkozy's plans to overhaul the French economy, giving his party a commanding lead Sunday in the first round of elections for parliament.

A parisian voter picks up a ballot paper prior to casting his vote in the first round of the French parliamentary election, Sunday, June 10, 2007 in the city hall of the 18th district in Paris. [AP]

Sarkozy's UMP party won 39.6 percent of the vote, while the opposition Socialists had 24.7 percent, the Interior Ministry said.

Sarkozy's conservatives have a strong advantage heading into the decisive runoff next Sunday, on track to expand their absolute majority in the 577-seat parliament. Control of the National Assembly is central to Sarkozy's agenda of tax cuts, labor reforms, and other plans to try to shake France out of its malaise.

The election sapped support from the fringes - including Jean-Marie Le Pen's once-influential extreme right National Front and the Socialists' farther-left allies - and leaves France facing a parliament tilted unusually well to the right.

Turnout was less than 61 percent - low for France - which pollsters blamed on a lack of suspense. The UMP has been widely expected to win since Sarkozy's strong victory over Socialist Segolene Royal in the presidential election last month. The main question was how badly the once-powerful leftists would lose.

Socialists tried to rally backing for the second round, tapping fears of an all-powerful "Sarko state" if the president's camp gets a lopsided majority.

"There are crushing majorities that crush, dominant parties that dominate, absolute powers that govern absolutely," Socialist leader Francois Hollande said.

Sarkozy's backers say a convincing mandate is the only way to get the French, eager to strike and wary of globalization, to reform.

"We want to set off a shockwave of confidence, a shockwave of growth," a buoyant Prime Minister Francois Fillon said Sunday night.

He laid out his agenda for change for the summer and autumn: reform of universities, making transport strikes less crippling, new anti-crime measures, freeing up the labor market and a plan to cut the large national debt.

Many outside the conservatives' circle dread the months to come.

Labor unions and student groups stand ready to resist with the kind of mass protests that logjammed reforms by former President Jacques Chirac.

Francois Bayrou, the third-place finisher in the presidential vote, warned of a "terribly" one-sided parliament.

"One day, France will regret this lack of balance. It is not healthy," said Bayrou. His fledgling new party MoDem won 7.6 percent.

The Socialists' downfall may send the party soul-searching about its direction in an era when many European leftists have moved to the center and come to terms with global capital markets.

Polling agencies TNS, Ipsos and CSA concurred that the UMP would expand its majority, but varied widely in projecting how many seats they would win: They predicted between 383 and 501 for the UMP and other mainstream right groups, and between 69 and 185 seats for the Socialists and other leftist parties.

In the current parliament, the UMP has 359 seats and the Socialists 149.

The National Front, which played the kingmaker in parliamentary races past and won 15 percent in 1997, won just over 4 percent this time - and not a single seat.

The Communists, who held 86 seats in parliament in the 1970s, are projected to win no more than 12 this time. The party's struggle for workers' rights has had substantial influence on French politics for many years.

The parliamentary election marked a milestone in modern French politics: Voters look set to return the outgoing majority to power for the first time since 1978.

Any candidate who wins more than 50 percent of the vote lands a seat straight out. In most cases there is no immediate winner, so all candidates with more than 12.5 percent of the vote go to the runoff.

A total of 7,639 candidates from 14 parties were vying for five-year terms in the assembly.

The interior minister said at least 53 candidates - all from Sarkozy's camp - won by an absolute majority in the first round.