Answer:
Political parties and interest groups differ on various levels: they can have different sizes, they can be focused on different issues and they can have different goals. The main difference between the two concerns their primary purpose: political parties aim at achieving power over governmental policy by supporting a candidate and winning elections; conversely, interest groups are created to promote a position or a view on specific issues but do not have members running for office. As such, interest groups often vote for candidates – who are put forward by political parties – who share their point of view. Other differences between the two include:
Political parties are more flexible than interest groups as they aim at achieving the support of the majority of their population in order to maximize their chances of winning elections. Conversely, interest groups are not flexible but focus on one issue (i.e. gun control) and promote their ideas trying to unite like-minded people;
Not all members of political parties have the same views on every issues. Political parties, in fact, focus on a variety of different aspects (i.e. education, taxes, migration, etc.) and interest groups surrounding one or more of the central issues often arise within political parties. Conversely, interest groups focus on specific issues and all members share the same view (i.e. pro or against abortion, or pro or against gun control, etc.); and
The size of political parties does not necessarily affect their chances of winning elections; conversely, the size of an interest group has a strong influence on the group’s ability to gain influence and to promote its views.
