CREATE TABLE table_2668243_22 (incumbent VARCHAR, district VARCHAR)
SELECT incumbent FROM table_2668243_22 WHERE district = "South Carolina 7"
ใครคือ "ผู้ดำรงตำแหน่ง" ของเขตเซาท์แคโรไลนา 7?
Who was the "incumbent" of district south carolina 7?