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_27696 ( "Round" real, "Circuit" text, "Location" text, "Date" text, "Pole position" text, "Fastest lap" text, "Winning driver" text, "Winning team" text, "Supporting" text )

### Question ###
Who got the pole position if the supporting is USAC National Midget Series?

### Accurate SQL ###

SELECT "Pole position" FROM table_27696 WHERE "Supporting" = 'USAC National Midget Series'