Bharatiya Janata Party (BJP) MLA Soumen Roy on Saturday has joined the ruling Trinamool Congress (TMC) during the announcement of bypolls dates in West Bengal. The BJP MLA from Kaliaganj was earlier a member of the TMC. With Soumen Roy joining the TMC, the BJP's tally in the state assembly has come down to 71. In the last four weeks, four BJP MLAs have switched to the TMC. The announcement of the bypolls clears the way for Chief Minister Mamata Banerjee to make her way back into the state assembly. Watch this video.