user: Question: Who was the Democrat when the Republican was Mike Huckabee, and the sample size was less than 495?
Columns: ['Poll Source', 'Sample Size', 'Date', 'Democrat', 'Republican']
Types: ['text', 'real', 'text', 'text', 'text']
Sample row: ['Survey USA', 520.0, 'Mar 14-16, 2008', 'Hillary Clinton', 'John McCain']
SQL:

assistant: SELECT "Democrat" FROM "Table" WHERE "Sample Size" < 495.0 AND "Republican" = 'Mike Huckabee';