"Stop groupism and start restructuring the party. Stop this infighting and start working for bigger causes," Brar said at the Youth Congress convocation here.
Senior WBPCC leaders Somen Mitra, Manas Bhuniya, Deepa Das Munshi, Abdul Mannan were present at the convocation.
"You are all fighting on smaller issues. You have to take your fight to the streets, to a bigger platform," he said.
"Forget about who is a top leader or who is a grassroot worker. We all have to fight hard. I ask everybody to work hard and nobody will be able to stop you," Brar said.
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Questioning the "silence" of Trinamool Congress MPs in Parliament on Lalitgate and Vyapam scam, Brar alleged that Mamata Banerjee and Narendra Modi has reached a "consensus".
"There was a buzz about an understanding between them (TMC and BJP) but with their leaders' absolute silence in the Parliament I am sure that a consensus has been reached between the two (Banerjee and Modi)," he alleged.
Claiming that Youth Congress would play a crucial role in next year's assembly election, Brar asked its leaders in the state to go for a membership drive.