The relationship between political parties and pressure groups can take different forms in the following ways '
(i) Pressure groups are often formed and led by
politicians and political parties. Most of the trade unions and student's organisations in our country are either established by or affiliated to one or the other major political party.Most of the leaders of the pressure groups are also the leaders or activist of any political party.
(ii) Political parties sometimes grow out of movements. Parties like DMK and AIADMK were formed due to reform movements of 1930s and 1940s.
(iii) Many times, the issues raised by pressure or ' movement groups are taken up by political parties, leading to a change in the policies of the political parties.