KOLKATA, June 11 -- Furious over being dropped from a signature forgery case via a late-night text message, veteran Trinamool Congress (TMC) leader and senior lawyer Kalyan Banerjee on Thursday launched a blistering public attack on party chief Mamata Banerjee's nephew and national general secretary Abhishek Banerjee, asked Mamata to choose between him and her nephew and even threatened to chart his own political course if the party continues to tolerate the younger leader's allegedly disrespectful style of functioning.

The four-term Serampore MP also declared that he would no longer represent Abhishek Banerjee in court.

"Henceforth, I won't be appearing in any legal matter of Abhishek Banerjee. I don't like his arrogance. I am a senior...