National Rally is leading in the first round of voting in a high-stakes election that puts France on course for a far-right government for the first time since World War II.

Projections by polling agencies suggest that National Rally secured a third of the vote during Sunday’s first round of parliamentary elections. On the opposite end of the political spectrum, early polling suggests the leftist alliance, New Popular Front, has 29% of the vote. French President Emmanuel Macron’s…