The most recent innovation has been tamer: People have banged pots whenever the president has appeared. Indeed, France’s labor unions — though representing a smaller share of the work force than elsewhere in Western Europe — have been united in their opposition, making them a redoubtable force. Jean-Luc Mélenchon, who leads the left-wing coalition NUPES, has been a central figure in the parliamentary fight against Mr. Macron, nearly bringing down his government with a no-confidence vote in March. And yet it is not France’s left that has benefited from the popular rebellion. In a situation that seems tailor-made for a resurgence of the left, how is it that, for the moment at least, it is not just the right but the far right that has benefited?

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