CREATE TABLE table_73390 ("District" TEXT, "Vacator" TEXT, "Reason for change" TEXT, "Successor" TEXT, "Date successor seated" TEXT)

Who was the successor for the Kentucky 2nd district?
SELECT "Successor" FROM table_73390 WHERE "District" = 'Kentucky 2nd'
SELECT "Successor" FROM "table_73390" WHERE "District" = 'Kentucky 2nd'