WI Sen swing map

[Bleach Blonde Bad Built Butch Bodies for Biden]

A thing I noticed: the north/south divide in the swing map for the Wisconsin Senate race aligns almost perfectly.



For reference, here's the presidential swing map:



Any rhyme or reason to this?

[Bleach Blonde Bad Built Butch Bodies for Biden]

The Senate map is swing from 2010. The presidential map is swing from 2012. Democrats were much stronger in rural Wisconsin in 2012 than 2010, so you see Democratic swings in the first map but Republican swings in the second. That's the biggest difference; adding a little bit of color is that Trump was a bit stronger in the state's rural west while Johnson was a bit stronger in the WoW counties, but the biggest difference is that the maps are comparing two different years to 2016.

Oh, yeah, I forgot that little detail.

I'm more interested in the north/south divide in the Senate race, though.  Maybe it's just a coincidence.