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_73 (incumbent VARCHAR, party VARCHAR, first_elected VARCHAR)

### Question ###
Who is the incumbent that is a republican and first elected before 1864?

### Accurate SQL ###

SELECT incumbent FROM table_name_73 WHERE party = "republican" AND first_elected < 1864