The West Bengal assembly elections are due by March-April next year.
He also said that the party "cannot be selective in fighting the communists" and it must do so in all its manifestations, irrespective of religion and colour.
The Congress on Friday suspended two of its legislators for voting for the Trinamool Congress in the Rajya Sabha biennial election for five seats in West Bengal.
Sharma had on Monday slammed Congress' association with the ISF led by Muslim cleric Abbas Siddiqui in West Bengal, contending that it was against the "Gandhian and Nehruvian secularism" and the party cannot be selective in fighting "communalists".
The Congress plans to ensure that even if its candidates fail to register a win in the Lok Sabha seats in West Bengal, the benefit should go to the Left Front and not to friend-turned-foe Mamata Banerjee's Trinamool Congress. Renu Mittal reports.
Three persons, including husband of a Communist Party of India-Marxist candidate, were killed on Monday and several others injured in violence during the second phase of panchayat elections in West Bengal where 75 per cent polling was recorded.
An inchoate anger is brewing within the party against the central leadership after the poor show in the assembly polls.