The great variation in size (from 21 to 53) between the regional groups is problematic in that it may mean equal representation is more difficult to achieve. Additionally, some of the groups might be in need of reform due to political changes within the group. Many members of the Eastern European Group have, in recent years, gradually aligned themselves with the Western European and Others Group due to their admission into the North Atlantic Treaty Organization and the European Union. Additionally, some members of the Western European and Others Group also feel disenfranchised due to increased coordination between European Union states that are in the group.