For the French establishment, Sunday's presidential election came close to a near-death experience. As the Duke of Wellington said of Waterloo, it was a "damn near-run thing." Neither candidate of the two major parties that have ruled France since Charles De Gaulle even made it into the runoff, an astonishing repudiation of France's national elite. Marine Le Pen of the National Front ran second with 21.5 percent of the vote. Emmanuel Macron of the new party En Marche! won 23.8 percent. Macron is a heavy favorite on May 7. The Republicans' Francois Fillon, who got 20 percent, and the Socialists'...