(i) In some instances, the pressure groups are either formed or led by the leaders of political parties or act as extended arms of political parties. For example, most trade unions and students’ organisations in India are either established by, or affiliated to one or the other major political party.
(ii) Sometimes political parties grow out of movements. For example, when the Assam movement led by students against the ‘foreigners’ came to an end, it led to the formation of the Asom Gana Parishad.
(iii) In most cases, the relationship between parties and interest or movement groups is not so direct. They often take positions that are opposed to each other. Yet they are in dialogue and negotiations. Most of the new leadership of political parties comes from interest or movement groups.