CREATE TABLE table_18405 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" FLOAT, "Result" CLOB, "Candidates" CLOB)

Who was the winner in the Louisiana 7 district?
SELECT "Incumbent" FROM table_18405 WHERE "District" = 'Louisiana 7'
SELECT "Incumbent" FROM "table_18405" WHERE "District" = 'Louisiana 7'