If sources are to be believed, there is a chance of Sinha switching over to the TMC on its July 21 Martyrs' day celebration function. Sinha, popularly known as "Bihari Babu", made lavish praise on Mamata Banerjee, calling her "real Royal Bengal tiger" and a "tried and tested leader who trounced propaganda and 'dhanshakti' (money power) in the just-concluded Bengal polls".