No, right. I got that it's a heat map, and how they work...
So what I am seeing here is that the Red areas are places that have both increased in diversity, as well as shown an increase in Republican voters.
And the blue areas show places that are now less diverse, and had fewer total votes for the Republican candidate.
So here's a knock-on question...
What is the baseline measurement the heat map is being generated from? The last time a Republican won (Bush II), or the last election (Obama II)? Or some mean of R vs D voting trends by county across X number of Presidential elections?
Sorry for being so dense about this... I just love maps and data, and am having a hard time interpreting what I am seeing in this one, or what trends these regions are experiencing (according to the data).