Politics is the way that people living in groups make decisions. Politics is about making agreements between people so that they can live together in groups such as tribes, cities, or countries. In large groups, such as countries, some people may spend a lot of their time making such agreements.

United States. In the United States, the meaning of the term has changed dramatically over the last 60 years. Before the American National Election Study (described in Angus Campbell et al., in The American Voter) began in 1952, an individual's partisan tendencies were typically determined from their voting behavior.Since then, "partisan" has come to refer to an individual with a …