PARIS — President François Hollande stunned France on Thursday when he announced that he would not run for a second term in next year’s presidential election. In a televised address from the Élysée Palace, Mr. Hollande said that he was “aware of the risks” of a candidacy that would not “rally” enough people to it. “I have thus decided not to be a candidate in the presidential elections,” Mr. Hollande said. Mr. Hollande, a Socialist, ended weeks of speculation about his intentions to participate in a re-election bid that few observers thought he could win. He has had some of...