Tell me the loewst assume office for madeleine bordallo
CREATE TABLE "delegates" (
  "district" text,
  "name" text,
  "party" text,
  "religion" text,
  "former_experience" text,
  "assumed_office" real,
  "born_in" real
);
SELECT MIN("assumed_office") FROM "delegates" WHERE "name"='madeleine bordallo';