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_19753079_4 (incumbent VARCHAR, result VARCHAR)

### Question ###
Name the incumbent for lost renomination republican hold

### Accurate SQL ###

SELECT incumbent FROM table_19753079_4 WHERE result = "Lost renomination Republican hold"