I think that there might be enough of a divide between sports fans and non-sports fans in general that the GOP would win an election with the electorate only being the fans for any US pro sports team (except maybe ones with a massive minority following).
Definitely not true in white liberal areas like the PNW and New England either.
Maybe the PNW, but it seems to me like the urban, white, hipster, culturally liberal type would never watch sports. I'd imagine that the fanbases of the Boston teams (except maybe the Celtics) are closer than you would think.
The white working class fanbase for those teams that you may be speaking of is still mostly Democratic in the Northeast.
