CREATE TABLE table_18339 ("District" TEXT, "Incumbent" TEXT, "Party" TEXT, "First elected" FLOAT, "Result" TEXT, "Candidates" TEXT)

what is the district where the incumbent is james a. haley?
SELECT "District" FROM table_18339 WHERE "Incumbent" = 'James A. Haley'
SELECT "District" FROM "table_18339" WHERE "Incumbent" = 'James A. Haley'