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_21531764_2 ( lower_house_majority VARCHAR, senior_us_senator VARCHAR )

### Question ###
What's the lower house majority in the state whose Senior senator is J. Shaheen?

### Accurate SQL ###

SELECT lower_house_majority FROM table_21531764_2 WHERE senior_us_senator = "J. Shaheen"