PARIS—What’s striking about the French presidential election is the extent to which the two front-runners share a basic analysis of the choice facing the country. Marine Le Pen, the leader of the right-wing National Front, and Emmanuel Macron, the 39-year-old former economy minister who quit François Hollande’s government to stand as an independent, are poles apart politically. But both agree that the defining issue is France’s membership of the eurozone.
Both point to the widening divergence between Germany and France’s economic performance during the past decade as evidence that the status quo isn’t sustainable. The National Front points to a recent International Monetary Fund study that suggested the euro is up to 15% undervalued in Germany and 6% overvalued in France as proof that France is at a competitive disadvantage. It argues that the only way France can remain a member of what one party official calls the “fixed eurozone exchange-rate regime” is to pursue an internal devaluation by cutting back on social protections and driving down wages. The alternative is to quit the eurozone. ...