“… one of the most predictive variables for a place becoming more Republican has been the number of people ethnically identifying as ‘American’…”

Something real has been percolating over the past decade in the Republican base when it comes to race and identity. When looking at the change in the county-by-county vote from 2000 to 2012, one of the most predictive variables for a place becoming more Republican has been the number of people ethnically identifying as “American,” not whether or not a person believes in smaller government or lower taxes. States such as Arkansas, Kentucky, Tennessee and West Virginia, where a plurality of people identified in the 2000 Census as “American,” are among those that have trended the most Republican since 2000.

Clare Malone, “The End Of A Republican Party”, FiveThirtyEight (18 July 2016) [http://fivethirtyeight.com/features/the-end-of-a-republican-party]