States where the urban-suburban vote or rural vote dominates

[Sol]

The base of the Republican electorate in South Carolina is in suburbs and small urban centers.

[Sol]

I don't think it's right to describe Idaho or Montana as dominated by rural votes at all.

More people in Idaho live in just Ada, Canyon, Kootenai, Bonneville, and Bannock counties than in the rest of the state combined, and most of the rest of the state lives in small cities and large towns as well, places like Moscow, Lewiston, Twin Falls, or Rexburg. Montana has basically the same pattern, and I suspect the same is true of Wyoming too.