Emmanuel Macron is poised for another massive victory in the French parliamentary elections next week, ensuring the country would adopt his centre-right agenda.

France's youngest leader since Napoleon entered the nation’s highest office with no previous experience as an elected candidate, yet has enjoyed a smooth few weeks as President.

The latest polls show his party, En Marche!, will gain big in the 11 and 18 June elections with more than half of the country’s 577 parliamentary seats.

His biggest struggle, an issue he hinted at during his victory speech last month, will be to maintain unity among a divided voter base and even a divided party, given it contains defectors from the socialist and the right-leaning camps.

“I’m aware of the divisions in our nation which have led some people to extreme votes,” he said on 8 May. “I respect them.”

But in a country that has swung from Francois Hollande’s socialist, high-tax government to the precipice of electing Le Front National’s Marine Le Pen as president, Mr Macron badly needs the parliamentary majority to pursue his own centre-right agenda. This includes lowering corporate tax, adopting pro-business laws and investing €50bn (£43bn) into job training and renewable energy over the next five years.

French Presidential Election Show all 20 1 /20 French Presidential Election French Presidential Election Voters line up to cast their ballots REUTERS French Presidential Election French expats queue along the street outside the Lycee Francais Charles de Gaulle to cast their vote in a polling station inside the school, in the first round of the 2017 French presidential election, in London, Britain April 23, 2017. REUTERS/Luke MacGregor - RTS13JM5 REUTERS French Presidential Election People line up to vote in the first round of 2017 French presidential election at a polling station in Vaulx-en-Velin near Lyon, France, April 23, 2017. REUTERS/Emmanuel Foudrot - RTS13HSP REUTERS French Presidential Election Police patrol polling stations in France REUTERS French Presidential Election Francois Fillon (L), member of the Republicans political party and 2017 French presidential election candidate of the French centre-right, casts his vote in the first round of 2017 French presidential election in Paris, France, April 23, 2017. REUTERS/Christophe Archambault/Pool - RTS13IH0 REUTERS French Presidential Election Benoit Hamon (C), French Socialist party 2017 presidential candidate, is surrounded by photographers as he leaves a polling station after voting in the first round of 2017 French presidential election in Trappes, near Paris, France, April 23, 2017. REUTERS/Vincent Kessler - RTS13I0Y REUTERS French Presidential Election French President Francois Hollande collects voting slips before casting his ballot in the first round of the 2017 French presidential election at a polling station in Tulle, France, on April 23, 2017. REUTERS/Georges Gobet/Pool - RTS13ITO REUTERS French Presidential Election A policeman walks by election posters near a polling station during the first round of 2017 French presidential election in Paris, France, April 23, 2017. REUTERS/Christian Hartmann - RTS13I3A REUTERS French Presidential Election Emmanuel Macron and wife Brigitte Trogneux REUTERS French Presidential Election Emmanuel Macron casts his ballot REUTERS French Presidential Election Emmanuel Macron, head of the political movement En Marche !, or Onwards !, and candidate for the 2017 French presidential election, waves hand during in the first round of 2017 French presidential election at a polling station in Le Touquet, northern France, April 23, 2017. REUTERS/Benoit Tessier - RTS13ICH SAA/ French Presidential Election Jean-Luc Melenchon, candidate of the French far-left Parti de Gauche and candidate for the French 2017 presidential election, leaves a polling booth in the first round of 2017 French presidential election at a polling station in Paris, France, April 23, 2017. REUTERS/Stephane Mahe - RTS13IKB REUTERS French Presidential Election Front National leader Marine Le Pen casts her ballot Marine Le Pen (L), French National Front (FN) political party leader and candidate for French 2017 presidential election, casts her ballot in the first round of 2017 French presidential election at a polling station in Henin-Beaumont, northern France, April 23, 2017. At R, Mayor of Henin-Beaumont Steeve Briois. REUTERS/Charles Platiau - RTS13IEI REUTERS French Presidential Election Early ballots are read as results continue to come in Reuters French Presidential Election Macron supporters react as results come in early in the evening AP French Presidential Election Supporters of Front National leader Marine Le Pen cheer as early results come in Reuters French Presidential Election Alamy Live News. J21KYW Paris, France. 23rd April 2017. Marcon supporters wave French and EU flags after the announcement that he is the leader in the exit polls after the polling stations have been closed. Supporters of Emmanuel Macron, the Presidential candidate from the social liberal political party En Marche! celebrate the exit polls, that see him in first place, ahead of Marine Le Pen from the Front National in the first round of the French Presidential election. Credit: Michael Debets/Alamy Live News This is an Alamy Live News image and may not be part of your current Alamy deal . If you are unsure, please contact our sales team to check. Alamy French Presidential Election Front National leader Marine Le Pen takes to the stage to address her supporters as fans cheer Reuters French Presidential Election Emmanuel Macron greets supporters on Sunday night AP French Presidential Election Emmanuel Macron and wife Brigitte Trogneux celebrate the incoming results EPA

“If we don't have a majority we'll be stuck in an in-between place,” said 28-year-old Pierre Person, an adviser to Mr Macron and a parliamentary candidate.

Many French people felt forced into voting for Mr Macron, the former economic adviser to Mr Hollande, last month to ensure Ms Le Pen did not win the second round.

Now, Ms Le Pen’s party faces an even more humiliating defeat as parties are adopting anti-FN alliances to back them out of parliament. The dire prospect for the FN comes despite strong voter support – between 25 and 33 per cent – backing the far-right party’s policies.

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The OpinionWay survey puts En Marche! at 335-355 seats out of 577, followed by 145-165 for the Republicans – leader François Fillion was knocked out in the first round due to a corruption scandal – a paltry 20-35 seats for the outgoing Socialist party, and between 21 and 34 seats for Jean-Luc Mélenchon’s far-left France Unbowed party. Mr Mélenchon insisted he did not want to weaken the Socialists’ party, but replace it.

A total of 7,882 candidates are fighting it out to gain a seat in parliament. Many of the En Marche! candidates are virtually unknown to voters and have no electoral experience, including a former bullfighter, a mathematician and business owners. Mr Macron was a former banker and founded his party one year ago.

The future victory is by no means certain, however.

Voter turnout is expected to be low, and the run-off system on 18 June – any candidate who does not win outright but wins more than 12.5 per cent will qualify – could throw up surprising results. Two of Mr Macron’s ministers, Richard Ferrand and Marielle de Sarnez, are facing allegations of financial misconduct, while the predicted largest opposition party, the Republicans, claims members who would support Mr Macron and those who have refused to co-operate.