[SC Swamp Fox]

I suspect that, because it's done to elect a black member of congress

Exactly. The 6th district snakes it's way through the state in such a way that it is just slightly majority black. This gives the democrats 2 seats in congress from SC where they would normally have only one if the districts were drawn for compactness or using logical geographic boundaries.

[Drammach]

The 6th district snakes it's way through the state in such a way that it is just slightly majority black

Does this explain the article's comment about the Interstate I-95 corridor ?
Does his district sort of follow the Interstate ?

[Galactic Overlord-In-Chief]

The 6th district snakes it's way through the state in such a way that it is just slightly majority black. This gives the democrats 2 seats in congress from SC where they would normally have only one if the districts were drawn for compactness or using logical geographic boundaries.

I read somewhere that when John Spratt retires, his seat would likely go Republican. I suspect if Clyburn's seat was in fact a fairly drawn and compact one, than perhaps the Republicans would hold all of SC's House seats.