When did Meg Whitman get 60%?
CREATE TABLE "republican_primary" (
  "poll_source" text,
  "date_s_administered" text,
  "tom_campbell" text,
  "meg_whitman" text,
  "steve_poizner" text,
  "peter_foy" text
);
SELECT "date_s_administered" FROM "republican_primary" WHERE "meg_whitman"='60%';