CREATE TABLE table_28867 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" CLOB, "Result" CLOB, "Candidates" CLOB)

Who was the 'incumbent' of district south carolina 7?
SELECT "Incumbent" FROM table_28867 WHERE "District" = 'South Carolina 7'
SELECT "Incumbent" FROM "table_28867" WHERE "District" = 'South Carolina 7'