The Communist Party of India (Marxist) is a Communist party in India. The party emerged from a split from the Communist Party of India in 1964. The CPI(M) was formed at the Seventh Congress of the Communist Party of India held in Calcutta from 31 October to 7 November 1964. The power of CPI(M) is concentrated in the states of Kerala, West Bengal and Tripura. At present in 2016, CPI(M) is leading the state governments in Tripura and Kerala. It also leads the Left Front in West Bengal.