Who is the incumbent when the elected year is 2004, the status is re-elected and the party is republican?
CREATE TABLE "election_results" (
  "district" real,
  "incumbent" text,
  "party" text,
  "elected" text,
  "status" text,
  "2010_candidates" text
);
SELECT "incumbent" FROM "election_results" WHERE "elected"='2004' AND "status"='Re-elected' AND "party"='Republican';