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_51 ( district VARCHAR, party VARCHAR, first_elected VARCHAR )

### Question ###
Which was the district that had first elected greater than 2006 and is democratic?

### Accurate SQL ###

SELECT district FROM table_name_51 WHERE party = "democratic" AND first_elected > 2006