The Concept of Constituency: Political Representation, Democratic Legitimacy, and Institutional DesignIn virtually every democratic nation in the world, political representation is defined by where citizens live. In the United States, for example, Congressional Districts are drawn every 10 years as lines on a map. Why do democratic governments define political representation this way? Are territorial electoral constituencies commensurate with basic principles of democratic legitimacy? And why might our commitments to these principles lead us to