What percentage was claimed that Republican: Kenny Hulshof got in the poll that also claimed Democrat: Jay Nixon got 48%?
CREATE TABLE "opinion_polling_for_the_united_states_gu" (
  "poll_source" text,
  "dates_administered" text,
  "democrat_jay_nixon" text,
  "republican_kenny_hulshof" text,
  "lead_margin" text
);
SELECT "republican_kenny_hulshof" FROM "opinion_polling_for_the_united_states_gu" WHERE "democrat_jay_nixon"='48%';