President Emmanuel Macron of France won a crucial stamp of approval on Sunday as voters gave him and his allies a decisive majority in parliamentary elections, but a record-low turnout cast a shadow over his victory, pointing to the hurdles he will face as he seeks to revive the country’s economy and confidence.
When the votes were counted, Mr. Macron’s party, La Republique en Marche (the Republic on the Move) and its allies had won 350 seats in the 577-member National Assembly, the lower house of Parliament.
Mr. Macron, a relative political newcomer who was elected on May 7, had called for