A right-wing party could seize power in France for the first time since the Nazis occupied the defeated country in World War II — with Marine Le Pen’s National Rally making huge gains in the first round of a high-stakes snap election Sunday.

The two-round ballot — which wraps up July 7 — could have a seismic impact on the European political landscape and fundamentally alter the continent’s financial markets, its support for Ukraine and how France manages its military and nuclear capabilities.

In Sunday’s first round of voting, Le Pen’s anti-immigration party National Rally outpaced President Emmanuel Macron’s centrist alliance, gathering 34% of the vote while Macron’s backers won just 20%, according to Politico.

“The French people have shown that they want to draw a line under seven years of [Macron’s] disdainful rule,” Le Pen said at an event in the French town of Hénin-Beaumont.

“We haven’t won yet, the second round will be crucial,” she said. “We need an absolute majority so that Jordan Bardella, in eight days, can be appointed prime minister by Emmanuel Macron.”

A coalition of left-wing groups called the New Popular Front had a stronger showing than Macron’s coalition, earning about 28% of the vote in a strong showing.

But National Rally’s victory could hand the party between 230 and 280 seats in France’s 577-seat assembly, Politico said.

Meanwhile, the left-wingers could get between 125 and 165 seats, while Macron’s people would only take between 70 and 100.

That won’t be clear until after the second round, however.

Macron will retain power until the end of 2027, regardless of what happens when France’s 50 million or so registered voters choose their future leaders.

French voters — like their American counterparts — have been increasingly frustrated over economic issues such as inflation and cost-of-living increases.

And they haven’t loved Macron’s leadership, which critics say appears arrogant and out-of-touch with the everyday life of the French citizen.

“People don’t like what has been happening,” said Cynthia Justine, 44. “People feel they’ve lost a lot in recent years. People are angry. I am angry.”

She added that “rising hate speech” has made it necessary to voice frustration with those holding and seeking power.

National Rally tapped into that discontent, particularly through social media platforms like TikTok.

Should Le Pen’s party win a parliamentary majority, Macron would likely have to name as prime minister Jordan Bardella, National Rally’s 28-year-old president, in an awkward power-sharing system that might derail Macron-backed initiatives.

Bardella — who has never governed — has already said he’d stop France from supplying long-range weapons to Ukraine.

His party has also questioned birthright citizenship, and wants to cut the rights of French citizens who have dual nationality.

Macron called for the early elections after conservatives won a massive victory in the European Parliament election earlier this month — which the French president thought could deadlock the legislature.

Macron believed calling the snap election would jerk voters out of their complacency and force them to turn out for a more moderate party in the national election — thereby marginalizing the right-wing.

His gamble appears to have failed.

With Post wires