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_201_27 ( id number, "#" number, "secretary of state" text, "prime minister" text, "tenure" text )

### Question ###
what secretary of state served under both prime minister laurier and prime minister king ?

### Accurate SQL ###

SELECT "secretary of state" FROM table_201_27 WHERE "prime minister" = 'laurier' INTERSECT SELECT "secretary of state" FROM table_201_27 WHERE "prime minister" = 'king'