We met author Chelsea Clinton when she was doing a book signing for her latest book: “She Persisted: 13 American Women Who Changed the World” (Philomel Books). She talked to us about being the daughter of the president of the United States and about her mom, Hillary Clinton, who served as secretary of state. She also talked us about her two children, Charlotte and Aidan. We were at the Barnes & Noble store in Union Square. Do you have a favorite between your two new books?