Here is a handy map showing the difference in how the various MS-01 counties voted between 2008 and 2010. The map on the left is how they voted in the Travis Childers-Greg Davis matchup from (November) 2008. Tuesday’s results are on the right side. A total of 14 counties flipped from Childers to Alan Nunnelee; none flipped to Childers.
Counties carried by a Democrat are in blue; those carried by a Republican are in red.