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_1341577_36 (candidates VARCHAR, incumbent VARCHAR)

### Question ###
Who are all the candidates who ran in the district where Ralph Regula is the incumbent?

### Accurate SQL ###

SELECT candidates FROM table_1341577_36 WHERE incumbent = "Ralph Regula"