• It will be a short victory lap for Emmanuel Macron, the president-elect of France, whose real fight against Europe’s “populist tsunami” now begins in earnest.

First, Mr. Macron must start translating his centrist promises into policy and assuaging those millions who voted against him, cast blank ballots or stayed home (Here’s our map of detailed results). He must also forge a working relationship with Chancellor Angela Merkel of Germany.