What do we need to know about political parties in order to understand them? In his classic study E. E. Schattschneider delineates six crucial points: A political party is an organized attempt to get control of the government. Parties live in a highly competitive world. The major parties manage to maintain their supremacy over the minor parties. The internal processes of the parties have not generally received the attention they deserve in treatises on American politics. The party is a process that has grown up about elections. And perhaps most important of all is the distribution of power...