Marumalarchi Dravida Munnetra Kazhagam (MDMK; ) is a political party in the Indian state of Tamil Nadu formed in 1994 by Mr. V. Gopalswamy (also known as Vaiko), a member of Rajyasabha and a party activitist of DMK. Mr. V. Gopalsamy grew in the party from his student days. He actively participated in the party agitations and courted imprisonment several times. He was detained under MISA during emergency with other party leaders and workers. His style of speaking is his own, quoting world events and history, he attracted a lot of support. Particularly the youths of DMK had a liking for him. This created antagonism towards him by the leaders and was forced out of the Parent body on false charges. His sympathy for the cause of the Liberation Tigers of Tamil Eelam is widely known. With the looming possibility of a vote of confidence in Parliament against the UPA, Two party MP's, L Ganesan and Genjee N Ramachandran, claimed that they enjoy the support of the majority of party cadre, decided to pledge support to the UPA government.They later withdrew their claim and joined DMK when it was found that they had forged letters of support of Party executives.
MDMK's worst poll performance ever in Tamil Nadu was registered in 1996 and its peak, a decade later, in 2006.