Walter Williams discusses secession, nullification, race, discrimination, and where he got his ideas. Walter Williams -- economics professor, syndicated columnist, and fill-in host for Rush Limbaugh -- discusses secession, nullification, race, discrimination, and where he got his ideas. Visit his website and check out his books, especially The State Against Blacks, Up from the Projects: An Autobiography, and Race and Economics: How Much Can Be Blamed on Discrimination?