Trinamool Congress has been rocked by one of the biggest internal rebellions in its history. A rebel faction led by Ritabrata Banerjee has claimed the support of 60 MLAs and formally sought recognition of a new leadership structure inside the Assembly. The faction has projected Ritabrata Banerjee as Leader of Opposition and submitted a letter to the Speaker backing the move. The development has triggered a direct challenge to the existing party structure and intensified questions over the authority of Abhishek Banerjee. While the rebels insist Mamata Banerjee remains their leader, the emergence of a parallel power centre has exposed deep cracks within the ruling party.