New Delhi, Feb. 11 -- Trinamool Congress, one of the larger Opposition parties, didn't sign the no-confidence notice against Lok Sabha Speaker Om Birla, exposing the rift in the Opposition camp over a key issue. TMC's Lok Sabha floor leader Abhishek Banerjee later said that his party MPs had "no problem signing the no-confidence motion" but they preferred a calibrated approach and all INDIA partners should have sent a letter to the Speaker highlighting their demands and issues. "All 28 TMC Lok Sabha MPs would have signed it. However, before moving the no-confidence motion, we want all INDIA bloc partners to sign a letter addressed to the Speaker, highlighting the four points on which the argument is based. For instance, eight INC MPs have b...