What was the reason for change to the successor that was seated on December 13, 1880?
CREATE TABLE "table1_2417395_4" (
  "district" text,
  "vacator" text,
  "reason_for_change" text,
  "successor" text,
  "date_successor_seated" text
);
SELECT "reason_for_change" FROM "table1_2417395_4" WHERE "date_successor_seated"='December 13, 1880';