CREATE TABLE table_name_49 (poll_source VARCHAR, nathan_deal VARCHAR, john_oxendine VARCHAR)

In what poll is Nathan Deal at 13% and John Oxendine at 28%?
SELECT poll_source FROM table_name_49 WHERE nathan_deal = "13%" AND john_oxendine = "28%"
SELECT "poll_source" FROM "table_name_49" WHERE "13%" = "nathan_deal" AND "28%" = "john_oxendine"