9.2 The two-party system  (Page 5/19)

Finally, party success is strongly influenced by local election laws. Someone has to write the rules that govern elections, and those rules help to determine outcomes. In the United States, such rules have been written to make it easy for existing parties to secure a spot for their candidates in future elections. But some states create significant burdens for candidates who wish to run as independents or who choose to represent new parties. For example, one common practice is to require a candidate who does not have the support of a major party to ask registered voters to sign a petition. Sometimes, thousands of signatures are required before a candidate’s name can be placed on the ballot ( [link] ), but a small third party that does have large numbers of supporters in some states may not be able to secure enough signatures for this to happen.

Given the obstacles to the formation of third parties, it is unlikely that serious challenges to the U.S. two-party system will emerge. But this does not mean that we should view it as entirely stable either. The U.S. party system is technically a loose organization of fifty different state parties and has undergone several considerable changes since its initial consolidation after the Civil War. Third-party movements may have played a role in some of these changes, but all resulted in a shifting of party loyalties among the U.S. electorate.

Critical elections and realignment

Political parties exist for the purpose of winning elections in order to influence public policy. This requires them to build coalitions across a wide range of voters who share similar preferences. Since most U.S. voters identify as moderates,