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1 There are areas of commonality, or consensus, within American public opinion, including consensus on the legitimacy of the government, equality of opportunity, liberty, and democracy.
Pressure groups work to change policy actively through direct interaction with policymakers. Public opinion is important in a democracy because the people are the ultimate source of political power. In theory, a government official has to take public opinion into account whilst deciding on a future course of action. This is not to say that politicians always do what people want.