After the trio who called on Trinamool Congress supremo Mamata Banerjee on Tuesday -- retired diplomat and ex-Janata Dal-United MP Pavan Varma; retired cricketer and former BJP MP Kirti Azad; former Congressman Ashok Tanwar -- it was Dr Swamy's turn to call on Didi at her nephew Abishek Banerjee's Delhi home on Wednesday, instantly triggering speculation of his joining the TMC.