Former judge of Calcutta HC, Abhijit Gangopadhyay, joined BJP on Thursday in the presence of state party chief Sukanta Majumdar, LoP Suvendu Adhikari and other BJP leaders. Gangopadhyay resigned from the post of judge on Tuesday. "I am joining the BJP as it is a national party, fighting against the corruption of the TMC in Bengal," he said after resigning.