Facing revolt within the TMC, the party's chief, Mamata Banerjee, has appointed MPs Derek O'Brien and Dola Sen as joint national secretaries who will "assist" her nephew, Abhishek Banerjee. This is being seen as a dilution of Abhishek's power, popularly known as "Bhaipo" and seen as Mamata's heir. TMC rebels have openly slammed Abhishek Banerjee after the election loss.