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_75 ( incumbent VARCHAR, district VARCHAR, results VARCHAR, party VARCHAR )

### Question ###
What is Incumbent, when Results is 'Re-Elected', when Party is 'Democratic', and when District is 'Minnesota 7'?

### Accurate SQL ###

SELECT incumbent FROM table_name_75 WHERE results = "re-elected" AND party = "democratic" AND district = "minnesota 7"