Apparently targetting the BJP-led government at the Centre, Chatterjee, TMC secretary-general and the state's Education Minister, alleged "attempts were being made to dislodge the government (headed by Mamata Banerjee) by holding out administrative threats).
He alleged that failing to counter Trinamool Congress politically which had stopped "BJP wave" in Bengal in 2014 Lok Sabha election, BJP was indulging in "political vengeance" against the TMC government and the party.
The rally, which saw INTTUC workers marching from Gandhi statue to Metro Channel in the heart of the city, was organised over BJP's alleged political vendetta against the party leaders.
Chatterjee also alleged CBI was "only harassing" his party leaders and not producing any charge sheet against them while probing the Saradha scam.
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"Why charge sheet is not being given as yet?" he said.
"Not only Mukul Roy, we are saying that TMC leaders are harassed... If anybody is guilty he can be chargesheeted but in this case that person has been harassed," Chatterjee said.