It’s not that they don’t want it live near each other, it’s that they already don’t, and have completely different ideas of what this country is, and should be. With some interesting exceptions like the “cotton belt” of high African-American percentage, Democrats are generally educated and urban, Republicans are less educated and rural.
Lets see if this gif I made posts properly this time. There’s a lot to look at here. The anomalies are fascinating, like the D county in Southern Montana with low ed and low density. It’s a Crow Indian Reservation!