Four candidates vying to lead the United Nations have spent hours being grilled about their views on issues from restoring global peace to ending escalating poverty — in what the U.N. General Assembly president called one of the toughest job interviews in the world. There was no clear victor after Chile’s Michelle Bachelet , Argentina’s Rafael Grossi, Costa Rica’s Rebeca Grynspan and Senegal’s Macky Sall fielded questions from U.N. ambassadors this past week. Plus, other candidates could wait until after the initial auditions to jump into the race to succeed U.N. Secretary-General António Guterres on Jan. 1. “This role matters,” said General Assembly President Annalena Baerbock, who presided over the question-and-answer sessions. “The secretary-general is not only the head of the U.N. and the world’s top diplomat — she or he also represents all 8 billion of us, defending the U.N.…