Trinamool Congress chairperson Mamata Banerjee on Saturday announced a 20-member national working committee amid a growing rift within the party. Banerjee will later name the new office bearers of the party, senior TMC leader Partha Chatterjee told reporters after a meeting at the West Bengal chief minister’s Kalighat residence. The announcement is seen as a bid to assert Banerjee’s control over the party, and stem dissension between a section of TMC’s old guards and the next generation leaders.