The fact that one out of every two French voters stayed away from the polls helped Macron and hurt the parties that had already been strongly battered during the presidential elections.
Projections show La République en Marche (Republic on the Move) and its MoDem ally set to win up to 445 seats in the 577-seat National Assembly.
Results from the first-round of elections suggested that gamble had paid off, with first-round voting data showing his party winning by a large margin.
Around 49 per cent of the electorate cast a ballot - one of the lowest levels in such an election in decades.
If no candidate manages to achieve that target, then all who won at least 12.5 per cent of registered voters go to the second round, where the victor will advance to Parliament.
"It's a muted, incomplete victory, because he does enjoy not the backing of a majority of the French people", Sliman told AFP.
Macron also wants to reinvigorate cooperation among the 27 members of the European Union in the wake of Britain's Brexit vote, notably by joint military spending and a shared budget for the countries that use the euro.
The results of the first round of voting in the parliamentary election were released early Monday, with Mr. Macron's party winning just over 28 percent of the vote, the most for any single party.
The Socialists, France's former ruling party, are seen losing 200 seats. Returns showed that the National Front would take about 13.5 percent of the vote, while Jean-Luc Mélenchon's leftist France Unbowed Party was expected to win just 11 percent.
Erin Hills doesn't play easy for Day, McIlroy
Fowler, who shared the 36-hole lead at the Masters in April, never came seriously close to bogey because he was never in trouble. Others, like former major winners Jordan Spieth (+1, 73) and Jason Day (+7, 79) struggled in the first 18 holes this weekend.
With all the ballots counted, Macron's LREM and MoDem won 32.3 per cent of the vote, according to BBC report.
"For the past month, the President has shown confidence, willingness and daring in France and on the worldwide stage", Mr. Philippe said, calling the result a vindication of Mr. Macron's "winning strategy".
Parliament risked having "no real oversight powers and no democratic debate worth speaking of", he warned. The Republicans, meanwhile, have been dogged by accusations of corruption and rocked by the failure of their presidential candidate, Francois Fillon, to progress to the second round of voting.
"We're on the ropes, decimated, in pieces", former junior education minister Thierry Mandon said, urging the party to "give the keys to the next generation".
But turnout was sharply down, at 48.7% compared with 57.2% in the first round in 2012, which analysts say reflected a sense of resignation among Mr Macron's opponents.
Seeing the new president widely acclaimed and admired on the worldwide stage has made voters at home sit up and take note - and decide to give him a chance.
Among the LREM political newcomers who went through to second round were his key ministers and a retired bullfighter. Le Pen said the country's electoral system favors larger parties and needed to be reformed.
The party of France's 39-year-old president coasted to victory in Sunday's first round on the back of his strong debut.
He has won praise for appointing a balanced cabinet that straddles France's long-entrenched left-right divide and taking a leading role in Europe's fight-back against US President Donald Trump on climate change.
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