This really wouldn't be a bad idea. We could run successive full page ads in a major paper detailing a specific Democrat racist every week with all their quotes etc.
Racist Democrats to be featured could include Hollings, Robert Byrd for his KKK membership, and Dick Gephardt for his White Citizens Council connections. Maybe later we could take on some of the historical figures like FDR, who ordered Japanese Internment and appointed a notorious Klan leader (Hugo Black) to the supreme court.