The European Union (EU) has long viewed the enlargement process as an extraordinary opportunity to promote political stability and economic prosperity in Europe. U.S. Administrations and many Members of Congress have long backed EU enlargement, believing that it serves U.S. interests by advancing democracy and economic prosperity throughout the European continent. Some U.S. officials are concerned that "enlargement fatigue" as well as the EU's ongoing financial crisis could hinder EU expansion. The status of EU enlargement and its implications for both the EU itself and U.S.-EU relations may be of interest to the second session of the 112th Congress.