Explaining the reasons for withdrawal of support to the UPA government, Left leaders accused the government for failing to check the "runaway" inflation and spiralling price rise.
"Nuclear deal and price rise are the issues on which we withdrew support", CPI(M) general secretary Prakash Karat said.
In the course of the campaign, Karat said the Left will also place before the people an alternative to meet energy requirements for development and for putting an end to the economic policies pursued by the government which are "harmful to farmers, rural poor, workers and other sections".
Plans are afoot to field top leaders, who will criss-cross the country, to attend public meetings and rallies organised in major towns in all states.