Numerous outlets have commented on the continued presence of an urban/rural divide in 2020 voting. Here is another example:

Rather than flipping more Obama-Trump counties, Biden instead exceeded previous Democratic win margins in Wisconsin’s two biggest cities, Milwaukee and Madison.
That pattern extended to Michigan and other battleground states, with Biden building upon Democrats’ dominance in urban and suburban jurisdictions but Trump leaving most of exurban and rural America awash in red.
The urban-rural divide illustrates the pronounced polarization evident in preliminary 2020 election results. The split underscores fundamental disagreements among Americans about how to control the coronavirus pandemic or whether to even try; how to revitalize the economy and restore jobs; how to combat climate change or whether it is an emergency at all; and the roles of morality, empathy and the rule of law in the body politic.
Four thoughts in reaction to this.
- The urban/rural divide is described in an interesting way above: it is cities and suburbs for Democrats and exurbs and rural areas for Republicans. This matches the patterns of this and recent elections. However, is separating the suburbs and exurbs worthwhile? Here is where county level analysis may not be fine-grained enough to see the patterns. Another way to put it might be this: there is a gradient in voting by party as the distance from the big city increases. Does it shade over to Republicans only in exurbs – which are suburbs on the outer edges? Is the 50/50 split a little before exurbs? A concentric circles approach could help though there still could be pockets that break with the overall pattern.
- Suburbs might just be too broad of a term to be useful in such analysis. The exurb/suburb split it one way to put it. Might it help to also think of different types of suburbs (wealthier bedroom communities, ethnoburbs/majority-minority communities, working-class suburbs, industrial suburbs, etc.)?
- Explaining the differences as urban/rural has a nice short ring to it and it fits the data. Introducing more categories in the middle is interesting to campaigns, pundits, and researchers but is harder to quickly describe. Perhaps the urban/suburban versus exurban/rural divide?
- Is the urban/rural divide one of the most fundamental aspects of polarization? Or, is it a symptom? In this story, the divide leads off the discussion of polarization on a number of fronts. But, what leads to these spatial patterns in the first place? While the geography is helpful to think about, are the real issues behind the urban/rural divide about race/ethnicity and class? Given residential segregation patterns in the United States, using the spatial patterns as an explanation covers up a lot of important social forces that led to those patterns in the first place.