French far-right leader Marine Le Pen on Sunday stood by a bid to make her party more respectable, at a congress dominated by its drubbing in recent regional polls, 10 months from presidential elections.

Le Pen's National Rally (RN), which had been tipped for strong gains in last month's elections, was left floundering after failing to win any of the 13 regions in mainland France.

The results raised questions about Le Pen's strategy of trying to tone down her party's anti-immigration, anti-EU rhetoric and position it as a more mainstream force -- at the risk of losing anti-establishment votes.

Addressing a party congress in the southern city of Perpignan, a combative Le Pen insisted she had made the right choice in trying to turn a movement once synonymous with racism and anti-Semitism into a "responsible" party that was ready to govern.

Marine Le Pen has faced questions over her leadership after a slip-up in regional elections
Marine Le Pen has faced questions over her leadership after a slip-up in regional elections AFP / RAYMOND ROIG

"We will not go back to being the National Front," she said, referring to the party's old name, which she changed in 2018 as part of an image makeover.

Polls suggest the presidential election will come down to another duel between Le Pen and centrist President Emmanuel Macron, who faced off in the final of the 2017 election.

Macron, 43, has yet to announce whether he will seek a second term, but is shown as comfortably beating Le Pen in a runoff if he does.

Le Pen loyalist Jordan Bardella will play a lead role in her presidential campaign
Le Pen loyalist Jordan Bardella will play a lead role in her presidential campaign AFP / VALENTINE CHAPUIS

Le Pen, 52, who is making her third bid for the top job, argued her greatest success so far had been "ideological".

"We were right about immigration, about society's descent into savagery, about globalisation and so many other subjects that dominate the political debate," she said. Many rivals from the mainstream right now shared the RN's diagnosis, she noted.

On crime, Le Pen painted a dark picture of a country infested with "crime bosses, Islamists and mafias" and vowed to restore the authority of the state.

She also promised a referendum on immigration if elected, to allow voters to decide who they wanted to allow into France.

Le Pen re-elected as head of France's far-right
Le Pen re-elected as head of France's far-right AFPTV / June RACLET

She was re-elected unopposed Sunday to a fourth term as party leader.

One of her proteges, Jordan Bardella, was chosen to stand in for her as party leader during her presidential campaign.

The media-savvy 25-year-old, who flopped in the regional elections in the greater Paris region, is currently the RN's deputy leader.

Le Pen was re-elected unopposed to a fourth term as party leader
Le Pen was re-elected unopposed to a fourth term as party leader AFP / VALENTINE CHAPUIS

Analysts say the key challenge for the far-right will be to get voters increasingly turned off by all politicians, including those on the fringes, to turn out on election day.

"They no longer go to vote just to say they are not happy," sociologist Erwan Lecoeur told France Info radio.

Le Pen made a special appeal to the anti-elite "yellow vest" protesters, who staged often-violent demonstrations in Paris and other cities week after week in 2018-2019, winning several concessions from the government.

Many yellow vests saw the protests as a vindication of the power of the street over the ballot box.

"The only winner of Yellow Vest abstentionism is Macron," Le Pen warned.

It was Marine Le Pen's unabashedly extremist father Jean-Marie who sent shockwaves through France in 2002 when he beat a Socialist to land a spot in the run-off of the presidential election. There, he was comfortably beaten by Jacques Chirac.

Jean-Marie Le Pen was thrown out of the National Front (later renamed the National Rally) in 2015 after a series of anti-Semitic remarks.

The scenario of a rematch between Le Pen and Macron is not a foregone conclusion.

Regional elections exposed the weakness of Macron's fledgling Republic on the Move (LREM) party, which finished last with seven percent of second-round votes.

Both Le Pen's and Macron's parties have downplayed the significance of the regional polls.

Macron is reportedly planning to resurrect a controversial pensions bill he put on the back burner during the Covid-19 crisis, to try to buff his credentials as a reformer.

The emergence of a strong candidate on the traditional right could sap him of support among centre-right voters.

Former minister Xavier Bertrand, re-elected as head of the northern Hauts-de-France region last month, is one of the heavyweights on the right aiming to turn the vote into a three-way race.

The Ifop-Fiducial poll of 1,337 respondents for the broadcaster LCI and Le Figaro newspaper, put him at 18 percent of the vote, behind Le Pen on 26 percent and Macron on 24-28 percent.