Interest groups whose primary purpose is something other than electoral politics are called 501 groups.
An interest group is referred to as a group or association of people having similar interests who come together to be any change in the policy of the government.
They are the group's influence people to seek their majority. One important function is to put pressure on those who make political decisions.
501 groups are defined as interest groups whose main objective is not electoral politics. The Internal Revenue Code of the United States defines it as a nonprofit organization.
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