From the National Review:
,,,Obama runs unusually strongly in counties with large universities. Academics — and I include here those who choose to live in university towns as well as those actually in or teaching school — seem to find Obama particularly appealing.
Also, Obama runs unusually well in many state capitals — Concord, Lansing, Tallahassee, Atlanta, Nashville, Santa Fe, Dover, Jefferson City, Sacramento, Trenton, Madison, Columbus, Austin — which of course have unusual concentrations of public employees (and in some cases big universities, as well).
Clinton’s highest percentages come in counties with large numbers of Latinos and what I call Jacksonians. You can see the latter in counties in what is loosely called Appalachia — southwest Virginia, southern Ohio, the north end of Georgia, non-metropolitan Tennessee, northern Alabama, northeast Mississippi, all of Arkansas, southern Missouri, eastern Oklahoma, east and central Texas.
These are lands that were settled by the colonial-era immigrants from northern England, Scotland, and Northern Ireland and their descendants, who thronged down the Appalachian chain and then, like their heroes Andrew Jackson and Sam Houston, kept going southwest. (article here)