What Republican District had Incumbent First Elected in 2000 then Re-elected?
CREATE TABLE "arizona" (
  "district" text,
  "incumbent" text,
  "party" text,
  "first_elected" real,
  "results" text
);
SELECT "district" FROM "arizona" WHERE "party"='republican' AND "results"='re-elected' AND "first_elected"=2000;