This is a map of each county in the US based on the most facebook likes for each American football team in that county. The strict state line affinities are interesting, but unsurprising. The most interesting bits are where the constituencies bleed into others' "territory".

Pity the poor #Jets . At least they weren't completely shut out. #Steelers  in WV, western PA, and eastern OH makes sense, but why big splotches in the Carolinas? #nfl

http://deadspin.com/5979970/facebook-data-provides-the-most-accurate-nfl-fandom-map-ever-created
https://www.facebook.com/notes/facebook-data-science/nfl-fans-on-facebook/10151298370823859
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