On the neighborhood level, many of us really do live in an electoral bubble, this map shows: More than one in five voters lived in a precinct where 80 percent of the two-party vote went to Mr. Trump or Mrs. Clinton. But the map also reveals surprising diversity.
(We've also created a tool that allows you to examine the data in a more personal way. It’s here.)
You might imagine that the Deep South, one of the most reliably Republican regions of the country, is a homogeneous zone of Republican strength. Instead, it’s a patchwork of overwhelming Democratic and Republican precincts, sometimes right next to each other. Democratic strength isn’t even confined to the cities, as it is in much of the rest of the country. It's an artifact of segregation in the most racially polarized part of the country.