By SUDHIN THANAWALA and JEFF AMY This combination of two separate photos shows Herschel Walker in Atlanta, May 24, 2022, left, and Sen. Raphael Warnock, D-Ga., in Washington, Jan. 18, 2022, right. Walker will represent the Republican Party in its efforts to unseat Warnock in the November 2022 election. (AP Photo) Wayne Black was one of the few African Americans in the crowd as about 100 people gathered recently at