"People across the country want a substitute for both Congress and BJP as they are fed up with increasing corruption and communalism in the country," Sarkar said here at a session of the 11th Assam state-level conference of Democratic Youth Federation of India, CPI-M's youth wing, last evening.
The state-level and regional parties can form an "honest and suitable alliance" to establish a non-communal, democratic and corruption-free government at the Centre on the basis of a common minimum agenda, he said.
The situation was the same for the BJP-led NDA as ally JD(U) is unhappy with BJP's projection of Narendra Modi as the prime ministerial candidate, he said.
The Left parties, in collaboration with regional and state-level parties, would play a major role to find a viable third substitute at the Centre, he claimed.