"A total of 52 percent of candidates came from the civil society, they have never held an electoral mandate," Ferrand said.
He added that none of the named candidates previously had a criminal record.
According to Ferrand, the rest of the candidates for the legislature's 577 seats were still to discuss. He pointed out that the party sought to gain a majority in the parliament.
"We want to build a majority for change and therefore obtain for La Republique en Marche an absolute majority in the national assembly," Ferrand said.
The two-round legislative election in France is scheduled for June 11 and June 18.
On May 7, Macron won the French presidential run-off with 66.1 percent of votes, defeating right-wing candidate Marine Le Pen. Following the election, Macron resigned as the leader of the En Marche! political movement, while the party itself was renamed into La Republique En Marche.
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