Results from the Election Commission of India website. Results does not deal with partitions of states (Bihar was bifurcated after the 2000 election, creating Jharkhand), defections and by-elections during the mandate period.
CPI(M) was formed in 1964, following a split from the Communist Party of India.
At first, CPI(M) and the CPI were hostile to each other, the first accusing the latter of revisionism, the latter accused former of sectarianism and extremism.
Indeed, CPI(M) regarded Indira Gandhi's government, and during the Emergency it joined hands with centrist and right-wing parties to defeat her in the 1977elections.
In the general elections in 1957, the CPI emerged as the largest opposition party.
CPI is recognized by the Election Comminsion of India as a "National Party".
Results do not deal with partitions of states (Bihar was bifurcated after the 2000 election, creating Jharkhand), defections and by-elections during the mandate period.