I feel like Swing Maps obscure the results of an election somewhat. In that, while a 10% swing to Trump tells us something about an area, a 10% swing to Trump in an area that voted 60% Democratic compared to an area that voted 20% Democratic are very distinct. The former represents a concern for the Democrats, while the latter represents an almost complete decimation.
Accordingly, I've made a map stating the Trump vote in terms of Romney votes (T vote / R vote * 100), which should give a better idea where Trump really made substantial gains compared to Romney. I'll be making one of these maps for Clinton as well.
Trump comparatively fell the most in Arlington County, VA, only scoring 58.6% of Romney's total.
Trump comparatively gained the most in Elliot County, KY, scoring 177.6% of Romney's total