By Justin Wingerter Staff Writer jwingerter@oklahoman.comWARR ACRES — On a recent Sunday afternoon, Kendra Horn stood alone at the front of a church auditorium, next to an empty seat with a sign that said “Steve Russell," and answered questions about health care, immigration, Social Security, pensions and student loan forgiveness. The roughly 100 people in the crowd before her were a diverse mix and many belonged to the voting blocs — union members, Hispanics, African-Americans — that Horn, a Democratic candidate for Congress, needs to turn out in large numbers on Nov.Read more on NewsOK.com