The posters touting the far right were sometimes hard to spot behind all the bunting and decorations heralding last week's 80th anniversary of the D-Day landings in France, which marked a major turning point in the war for the allied nations fighting Nazi Germany. But they were there, lurking behind the Union Jack, the Stars and Stripes and the Maple Leaf strung along the streets of Normandy's wartime villages: campaign posters for Marine Le Pen's far-right National Rally (RN), which emerged victorious on Sunday in European Parliament elections. The pro-Europe centrist party of French President Emmanuel Macron — who led...