French President Emmanuel Macron and his allies were on Monday beginning a week of intense campaigning ahead of the second round of legislative elections to prevent the far right in a historic first from taking an absolute majority and control of government.

The far-right National Rally (RN) party of Marine Le Pen won a resounding victory in the first round of the polls Sunday, with Macron’s centrists trailing in third behind a left-wing coalition.

But the key suspense ahead of the second round on 7 July was whether the RN would win an absolute majority in the new National Assembly, as well as the largest number of seats.

That would enable the party of far-right figurehead Le Pen to be certain of taking power and for her protege Jordan Bardella, 28, to become prime minister.

French Prime Minister Gabriel Attal, who is likely to be forced to resign after the second round, warned that the far right was now at the “gates of power.” The RN should not get a “single vote” in the second round, he said.

“We have seven days to spare France from catastrophe,” said Raphael Glucksmann, a key figure in the left-wing alliance.

Macron had stunned the nation and baffled some allies by calling snap polls after the RN trounced his centrist forces in European Parliament elections this month.

Projections from prominent French polling firms gave the RN 33.2-33.5 percent of the vote, compared to 28.1-28.5 percent for the left-wing New Popular Front alliance, and 21.0-22.1 percent for Macron’s centrist camp.

The polling agencies projected this would give the RN a majority of seats in the 577-seat National Assembly after the second round. But it was far from clear the party would garner the 289 seats needed for an absolute majority.