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_91 (republican__democratic VARCHAR, state_ranked_in_partisan_order VARCHAR)

### Question ###
What is the ratio of Republicans to Democrats in South Carolina?

### Accurate SQL ###

SELECT republican__democratic FROM table_name_91 WHERE state_ranked_in_partisan_order = "south carolina"