The Socialist Party of France and the hard-left La France Insoumise (LFI) party have reached an agreement in principle to form an alliance for the June parliamentary elections, according to LFI lawmaker Adrien Quatennens, who spoke to Franceinfo radio on Wednesday.

The coalition agreement, forged under the leadership of hard-left firebrand Jean-Luc Melenchon, is an attempt to deny newly re-elected President Emmanuel Macron a parliamentary majority in the June 12-19 election and stymie his pro-business agenda.

Melenchon, a radical eurosceptic, has managed to unite the Greens, Communists, and Socialists under a new banner that may raise eyebrows across the EU, as its platform aims to challenge the bloc’s main tenets of economic policy.

“We can and will defeat Emmanuel Macron, and we can do so with a majority to govern for a radical agenda,” Quatennens said.

The agreement would then need to be approved by the National Committee of the Socialist Party.

If approved, the agreement will bring together parties that have run separately in elections since the left-green coalition deal of 1997-2002.