MARINE LE PEN tried her best to flee her father and politics, she says, oppressed by the infamy of her inheritance, which followed her everywhere. But now she is widely expected to succeed Jean-Marie Le Pen as leader of the National Front, the persistent far-right party preaching French purity and exceptionalism, opposing immigration and the European Union, and which she wants to bring into the media age. More and more, she is the face of the party in television debates and national campaigning. “It’s amazing to see how destiny can mock you sometimes,” she said in a long interview at...