To point out the obvious, "American."
Indeed, I alluded to it with my Appalachian reference.
But are "Americans" more likely to support McCain outside of that Appalachian zone? Or does that just represent areas of the South where there are whites-a-plenty?
I think "Americans" are disproportionately (but not nearly exclusively), um, "patriotic redneck" sorts. I've always wondered whether Scots-Irish vs. Scottish vs. Irish "vote splitting" affected this.
I'd imagine that "American" everywhere = much more Republican.
I haven't tallied it, but I would bet that the vast majority (say >90%) of counties with an "American" plurality voted for McCain.