LE HAVRE, France — Former Prime Minister Édouard Philippe is often seen as the centrist candidate best placed to challenge the far right in France’s presidential election next year — but his political future is under threat in the gritty industrial port of Le Havre. Philippe, one of President Emmanuel Macron’s most popular former lieutenants, has been mayor of this city in Normandy since 2020, but polling suggests he now faces a make-or-break battle not to lose it to a Communist rival in the