CREATE TABLE table_25424 ("District" TEXT, "Vacator" TEXT, "Reason for change" TEXT, "Successor" TEXT, "Date successor seated" TEXT)

Who is the successor for massachusetts 8th?
SELECT "Successor" FROM table_25424 WHERE "District" = 'Massachusetts 8th'
SELECT "Successor" FROM "table_25424" WHERE "District" = 'Massachusetts 8th'