CREATE TABLE table_25027 ("District" CLOB, "Vacator" CLOB, "Reason for change" CLOB, "Successor" CLOB, "Date successor seated" CLOB)

Who was the latest to take office in Massachusetts 3rd district?
SELECT "Successor" FROM table_25027 WHERE "District" = 'Massachusetts 3rd'
SELECT "Successor" FROM "table_25027" WHERE "District" = 'Massachusetts 3rd'