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_name_35 (sample_size VARCHAR, date VARCHAR, democrat VARCHAR)

### Question ###
What was the sample size for polling on May 2-7, 2007 for Hillary Clinton?

### Accurate SQL ###

SELECT sample_size FROM table_name_35 WHERE date = "may 2-7, 2007" AND democrat = "hillary clinton"