West Virginia, South Carolina, Georgia, Northern Florida, Alabama, Mississippi, Most of Virginia, Kentucky, Tennessee, Most of Missouri, Wyoming, Idaho, Oklahoma, Louisiana, and Texas--probably others.
Lots of other states bifurcate--Colorado outside the Denver Metropolitan, Washington and Oregon East of the Cascades, Nevada North of Las Vegas, etc.
Agreed. Walter E. Williams was making a hypothetical statement. Also note that he wrote that in September 2000.