CREATE TABLE table_name_29 (date VARCHAR, republican VARCHAR, sample_size VARCHAR)

What was the date of the poll with a sample size of 496 where Republican Mike Huckabee was chosen?
SELECT date FROM table_name_29 WHERE republican = "mike huckabee" AND sample_size = 496
SELECT "date" FROM "table_name_29" WHERE "mike huckabee" = "republican" AND "sample_size" = 496