Which poll source has a lead of 17?
CREATE TABLE table_name_87 (poll_source VARCHAR, lead_margin VARCHAR)
SELECT poll_source FROM table_name_87 WHERE lead_margin = 17
### Context: CREATE TABLE table_name_87 (poll_source VARCHAR, lead_margin VARCHAR) ### Question: Which poll source has a lead of 17? ### Answer: SELECT poll_source FROM table_name_87 WHERE lead_margin = 17