Your assumption is that today’s white Southern voters are identical to past white Southern voters and that’s simply not true.

The changes are the result of a heavy influx from other states as well as generational changes demanded from native sons and daughters, black, white and brown who live and work together w/o incidence or thought.

Yes, there are some who inhabit enclaves that mourn over the loss of the Old South and fantasies of yesteryear’s paradise, but they are fewer and fewer, choosing to move up north to enclaves that cater to their mindset.

Furthermore, as David French detailed in NRO, “It (as in GOP) underestimated the extent to which many of its voters hadn’t so much embraced the corporate conservatism of the Chamber of Commerce or the constitutional conservatism of the Tea Party as much as they had rejected the extremism of the increasingly shrill and politically correct Left.”

Read more at: http://www.nationalreview.com/article/429853/donald-trumps-voters-conservatism

The map he included in what we know now was a prescient article from January of this year didn’t present a Southern win, but a swath going through the Appalachians on into New York.