Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_15781170_2 (poll_winner VARCHAR, original_air_date VARCHAR)

### Question ###
Name the poll winner for march 19, 2008

### Accurate SQL ###

SELECT COUNT(poll_winner) FROM table_15781170_2 WHERE original_air_date = "March 19, 2008"