CREATE TABLE table_24503 ("District" CLOB, "Vacator" CLOB, "Reason for change" CLOB, "Successor" CLOB, "Date successor seated" CLOB)

Why did Robert L. Bacon (r) vacate?
SELECT "Reason for change" FROM table_24503 WHERE "Vacator" = 'Robert L. Bacon (R)'
SELECT "Reason for change" FROM "table_24503" WHERE "Vacator" = 'Robert L. Bacon (R)'