Obesity and the Bad Stripe

Maps here. Obesity splits into two bands in the eastern U.S.; one is the Bad Stripe and one is the Black Belt. I originally noticed the Bad Stripe when it shifted more Republican for president in the 2008 election (the opposite of the rest of the country) and then when the same shape continued to appear in maps of other indicators. My initial surprise about the Bad Stripe is that it was not the Black Belt, which can be clearly seen on the obesity map.