Raja, who was here to attend a meeting to mark the merger of the Communist group Lal Nishan Party (LNP) with the CPI, also said it was time that the Communist parties thought about their "re-unification."
"LNP joining the CPI is a positive development. Other Left forces should also introspect to take on the challenges thrown up by RSS and other right wing fascist forces," Raja told PTI.
"There is a historic necessity to take on the BJP by rallying democratic and secular forces," he said. "We should think of reunification of the communist movement," he added.
After the split in the undivided Communist party in India, the LNP as a political outfit was formed in 1965.
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Bhalchandra Kango, state secretary of CPI, who was present on the occasion, said "the merger with LNP will work as a catalyst for the communist unification process."
"They had left us but their commitment to Marxism remained," Kango said. "LNP's merger with CPI without any precondition is a very big thing," he added.
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