A fascinating mapping of estimates of affective polarization (how Americans feel about members of the opposing major party).  The polling question isn’t new, but I think that mapping the results onto counties by their demographic composition might be. 

(Note: this doesn’t mean that people in Florida or South Carolina or Massachusetts are actually irreconcilably prejudiced against opposing party members, or that folks in New York, North Carolina, or Nebraska aren’t — just that counties in those states share demographic traits correlated to the demographics of folks who do or don’t share high levels of partisan prejudice.)