Campaigning kicked off Monday for France's snap parliamentary election, which opinion polls suggest the far-right National Rally will win ahead of a left-wing ticket, with President Emmanuel Macron's centrist alliance trailing in third.

Political uncertainty has triggered heavy selling of French bonds and stocks since Macron unexpectedly called the election after Marine Le Pen's National Rally (RN) trounced his ruling centrist party in European Parliament elections.

Macron's gamble, hoping to catch other parties off-guard with just a few weeks to prepare for the ballot, may backfire, the latest survey by Ifop for LCI suggested.

The poll suggests the eurosceptic, anti-immigration RN will get 33% of votes in the first round on June 30, a figure down two points from Ifop's previous poll. But added to the share of the conservative Republicans willing to form an electoral alliance with the RN, the total reaches 37%.

The alliance of left-wing parties now stands at 28%, up two points, whereas Macron's camp is a distant third at 18%, down one point. The second round will take place on July 7.

Official campaigning began Monday after a week in which parties scrambled to field candidates and strike alliances.

Macron's allies repeated assertions that a victory for RN, or for the left, could create a financial crisis. Prime Minister Gabriel Attal told RTL radio that a victory for either would be catastrophic for France, its economy and jobs.

Macron gathered key ministers and aides on Sunday evening to discuss the election, a source who took part said, adding that Macron's party had decided not to field any candidates in about 60 constituencies - out of 577 - where they considered that another mainstream candidate was in a better position to win.

But some in Macron's camp expressed doubts publicly about the snap election.

"This (dissolution of parliament) is the decision of the president, it's his prerogative," Finance Minister Bruno Le Maire told France Inter radio on Sunday.

"What I observe is that it has created in our country, among the French people everywhere, worries, incomprehension, sometimes anger. That's what I see among our voters."
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