Without introduction, the tall, lean candidate in his dark-rimmed glasses and conservatively cut pin-stripe suit, appearing more like a professor than a politician, strode toward the podium. Only a huge photo of him and his 14-year-old daughter decorated the former chapel of a convent in Colmar. Then quickly, his hands clasped behind his back, Finance Minister Valéry Giscard d'Estaing, 48, broke into the pedantic delivery that has become a trademark in his campaign to succeed the late Georges Pompidou as President of France.
Although ten men and one woman are running against him, Giscard's most important rival in the May 5...