CREATE TABLE county (County_name VARCHAR, County_id VARCHAR)
CREATE TABLE election (District VARCHAR)

Show the names of counties that have at least two delegates.
SELECT T1.County_name FROM county AS T1 JOIN election AS T2 ON T1.County_id = T2.District GROUP BY T1.County_id HAVING COUNT(*) >= 2
SELECT "T1"."County_name" FROM "county" AS "T1" JOIN "election" AS "T2" ON "T1"."County_id" = "T2"."District" GROUP BY "T1"."County_id" HAVING COUNT(*) >= 2