CREATE TABLE "table1_2159571_2" (
  "district" text,
  "vacator" text,
  "reason_for_change" text,
  "successor" text,
  "date_successor_seated" text
);

Question: Who is every successor for the Washington 3rd District?
SQL: SELECT "successor" FROM "table1_2159571_2" WHERE "district"='Washington 3rd';

Question: What is every reason for change for the Washington 3rd District?
SQL: SELECT "reason_for_change" FROM "table1_2159571_2" WHERE "district"='Washington 3rd';

Question: Who is every vacator with reason for change as resigned December 31, 1959?
SQL: SELECT "vacator" FROM "table1_2159571_2" WHERE "reason_for_change"='Resigned December 31, 1959';