CREATE TABLE table_73404 ("District" TEXT, "Vacator" TEXT, "Reason for change" TEXT, "Successor" TEXT, "Date successor seated" TEXT)

Who is the vacator when south carolina 4th is the district?
SELECT "Vacator" FROM table_73404 WHERE "District" = 'South Carolina 4th'
SELECT "Vacator" FROM "table_73404" WHERE "District" = 'South Carolina 4th'