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_2515 ( "District" text, "Vacator" text, "Reason for change" text, "Successor" text, "Date successor seated" text )

### Question ###
what is the reason for change where the date the successor was seated was july 28, 1876?

### Accurate SQL ###

SELECT "Reason for change" FROM table_2515 WHERE "Date successor seated" = 'July 28, 1876'