Why are GOP swings more intense than Dem swings

[Del Tachi]

Nothing novel to add here:  Democratic gains have been mostly contained to cities/suburbs, which would require a very large numeric shift to produce an equivalent swing to what we've seen in less populous rural areas. 

It's somewhat equivalent to the development curve:  the empirical observation that larger economies grow at a slower rate than smaller ones.  It isn't that larger economies are less innovative, but only that an equivalent amount of investment looks much smaller to an economy like China than it does one like Malawi.