What District had Republican Incumbent Cathy McMorris?
CREATE TABLE "races_and_results" (
  "district" text,
  "incumbent" text,
  "party" text,
  "elected" real,
  "status" text,
  "2008_candidates" text,
  "results" text
);
SELECT "district" FROM "races_and_results" WHERE "party"='republican' AND "incumbent"='cathy mcmorris';