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_21046 ( "Poll Source" text, "Dates administered" text, "Democrat: Mark Begich" text, "Republican: Ted Stevens" text, "Lead Maragin" real )

### Question ###
On July 17, 2008, what was the total number of lead maragin?

### Accurate SQL ###

SELECT COUNT("Lead Maragin") FROM table_21046 WHERE "Dates administered" = 'July 17, 2008'