In recent comparative works on the constitutional structures of contemporary liberal democracies, the United States and Germany have been grouped together as examples of democratic systems with an exceptionally high degree of “institutional pluralism”. In other typologies both countries have even been classified as “semisovereign democracies”. Whereas such classifications are of some use, especially in the field of public policy research, they fail to pay reasonable attention to the fundamental difference between parliamentary and presidential government that dominated the older literature on comparative political systems. As the comparative assessments offered in this paper suggest, the difference between parliamentary government and presidential government does not only constitute very different conditions of executive leadership in the core executive territory and at the level of executive-legislative relations, but has also a strong impact on the role and performance of the various “veto players” that characterize the political systems of the United States and Germany, and which are at the center of this paper
