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_44625 ( "Poll Source" text, "Sample Size" real, "Margin of Error" real, "Date" text, "Democrat" text, "Republican" text )

### Question ###
Where is the poll source when Hillary clinton was the democrat, john mccain was the republican, and the margin of error was less than 4.5 on May 2-7, 2007?

### Accurate SQL ###

SELECT "Poll Source" FROM table_44625 WHERE "Democrat" = 'hillary clinton' AND "Margin of Error" < '4.5' AND "Republican" = 'john mccain' AND "Date" = 'may 2-7, 2007'