The
All India Anna Dravida Munnetra Kazhagam is an Indian regional political party with great influence in the state of Tamil Nadu and the union territory of Puducherry. It is a Dravidian party founded by the former chief minister of Tamil Nadu M. G. Ramachandran (M.G.R.) at Madurai on 17 October 1972 as a breakaway faction from the Dravida Munnetra Kazhagam after M. Karunanidhi expelled him from the party for demanding an account as the party treasurer. The party is adhering to the policy of socialism and secularism based on the principles of C. N. Annadurai (Anna) collectively coined as
Annaism by M.G.R. The party has won a seven-time majority in the Tamil Nadu Legislative Assembly and has emerged as the most successful political outfit in the state's history. It is currently the main opposition party in the Tamil Nadu Legislative Assembly.