I said Missouri, because it's more elastic than SC, and cities and suburbs in SC, especially Spartanburg, are actually trending R. Spartanburg County is unusual in that while it's growing about as fast as Richland County, it seems to be attracting non-college whites instead of young professionals like we see in most other cities in the sunbelt.
Trump won South Carolina's White college graduates by 31 points, so I'm not sure why an influx of them into anywhere would be good for SC Dems...?
I was assuming that the path to victory in SC for Dems would include picking up a good number of White college grads, but if that's not the case, than my argument is moot.