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
[{'County_name': 'Howard'}, {'County_name': 'Baltimore County'}, {'County_name': 'Colony'}]