America’s counties are less purple than they used to be
- Written by Robert J. Vanderbei, Professor of Operations Research and Financial Engineering, Princeton University
Looking at county election results shows the geography of America's partisan divide.Robert VanderbeiThe United States isn’t mostly red or mostly blue. It’s mostly purple. That’s what I’ve learned from a quarter-century of making maps based on the results of presidential elections.
The country is, however, becoming more...
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