Bianca Williams, 20, a hair stylist in Brooklyn, said the campaign had changed her life. After seeing Mr. Obama in the first debate, Ms. Williams decided to go back to community college part-time. “After seeing his success, I started thinking maybe I could help my community like he did,” she said. “If he could do it then I could do it. It woke me up, careerwise. It just gave me the willpower to go on.” - Michael Muller