CREATE TABLE table_18693 ("District" TEXT, "Incumbent" TEXT, "Party" TEXT, "First elected" FLOAT, "Result" TEXT, "Candidates" TEXT)

In what district was the incumbent Cordell hull?
SELECT "District" FROM table_18693 WHERE "Incumbent" = 'Cordell Hull'
SELECT "District" FROM "table_18693" WHERE "Incumbent" = 'Cordell Hull'