Yashwant Sinha joins TMC; says there's nobody to monitor govt's 'whimsical' behaviour While addressing a press conference after his induction into the Mamata Banerjee-led party, Sinha said there is no one to monitor the government and went on to invoke late Prime Minister Atal Bihari Vajpayee BusinessToday.In | March 13, 2021 | Updated 14:47 IST Yashwant Sinha joins TMC (Image: ANI) Ahead of upcoming West Bengal assembly elections, former union finance minister and BJP leader Yashwant Sinha has joined the Trinamool Congress (TMC) in Kolkata. While addressing a press conference after his induction into the Mamata Banerjee-led party, Sinha said there is no one to monitor the government and went on to invoke late Prime Minister Atal Bihari Vajpayee.