This is a significant achievement for Mr. Macron's LREM, considering how the party did not even exist a year ago, and how many of its candidates have little or no political experience. That's being blamed on voter fatigue, after a long and divisive presidential campaign that saw Macron elected last month.
Following his win in the presidential vote, Macron changed the name of his party of La Republique En Marche!
After a record 10.6 million votes in the presidential run-off, the National Front will get only a handful of MPs.
Cambadelis called on voters to favor more political pluralism in the second round.
"France is back", said French Prime Minister Edouard Philippe.
"The French people have shown that they want us to move quickly", said government spokesman Christophe Castaner. The prime minister also thanked security services for protecting voting stations and ensuring a safe vote after a string of deadly extremist attacks. Only three candidates won seats outright in the first round, officials said.
Le Pen has spent the past six years since taking charge of the FN trying to expunge the xenophobic, anti-Semitic ethos engendered by her father Jean-Marie Le Pen, who co-founded the party in 1972.
Paris: French voters went back to the polls Sunday for the first round of parliamentary elections that are tipped to give President Emmanuel Macron's centrist party a commanding majority.
One of Macron's key economic policies involves loosening France's extensive labour legislation, and a clear parliamentary majority is likely to pave the way for its introduction in the near future.
Macron's camp was comfortably leading with more than 32 percent - putting it well ahead of all opponents going into the decisive second round of voting next Sunday for the 577 seats in the lower-house National Assembly.
He said the massive majority Macron is projected to win is "neither healthy nor desirable" and warned against "unanimity" in parliament.
Less than half of voters cast their ballots, however, raising fears that the president's mandate could be weakened by a lack of participation.
"We are grateful for the trust you have placed in all the new faces of the Republic", Catherine Barbaroux, the party's president, told supporters after seeing the projected results. ("The Republic on the Move!"), abbreviated as LREM, and attracted dissenters from the French Socialist Party, the conservative Republicans party, and smaller parties.
The near-final first-round tally pointed to a legislative majority so crushing that Mr Macron's rivals fretted that the 39-year-old president will be able to govern France nearly unopposed for his full five-year term.
It is noted that French voters have traditionally rallied behind their new leader in the legislative elections that follow the presidential ballot. They had 314 seats in the last election but could end up with 25 or fewer seats in the new National Assembly, pollsters projected.
The vote delivered a further crushing blow to the Socialist and conservative parties that had alternated in power for decades until Macron's election in May blew apart the left-right divide.