CREATE TABLE table_18657 ("District" CLOB, "Incumbent" CLOB, "Party" CLOB, "First elected" FLOAT, "Result" CLOB, "Candidates" CLOB)

What candidate is in Louisiana 6?
SELECT "Candidates" FROM table_18657 WHERE "District" = 'Louisiana 6'
SELECT "Candidates" FROM "table_18657" WHERE "District" = 'Louisiana 6'