PARIS — French voters appeared to have boosted the prospects of the far right while potentially shattering the centrist alliance of President Emmanuel Macron, according to projections released after polls closed in the first round of French legislative elections on Sunday.

       Projections by France’s public broadcaster showed the far-right National Rally, guided by Marine Le Pen and her protégé, Jordan Bardella, comfortably securing the top spot with 33 percent of the national vote. An alliance of leftist parties, the New Popular Front, was in second, projected to garner 28 percent. Macron’s Together alliance lagged behind, with 21 percent.