There is no other resource that so clearly and concisely explains every key aspect of the national legislature. This classic, easy-to-use reference is thoroughly updated with new entries covering the dramatic congressional events of recent years. Each of the more than 250 entries, arranged in encyclopedic A-to-Z format, provides accessible insight into the key questions readers have about the U.S. Congress. This invaluable online edition helps make sense of the narrow power division between Republicans and Democrats, the methods members use to advance their agendas, the influence of lobby groups, the key role of committees and strong-willed leaders, and much more. Lists heads of state and political leaders around the world.