Outraged by false allegations of fraud against a Georgia elections employee in 2020, Amanda Rouser made a vow as she listened to the woman testify before Congress in June about the racist threats and harassment she faced. “I said that day to myself, ‘I’m going to go work in the polls, and I’m going to see what they’re going to do to me,’” Rouser, who like the targeted employee is (b)lack, recalled after stopping by a recruiting station for poll workers at Atlanta City Hall on a recent afternoon. “Try me, because I’m not scared of people.” About 40 miles...