TMC MPs Join BJP: Inside The Kolkata Defection That Just Reshaped West Bengal's Rajya Sabha Math

Three flags changed hands in Salt Lake on a Thursday afternoon, and by evening the numbers in India's Upper House had quietly shifted. That is the short version. The longer one, the one worth sitting with, is that this is not just another defection story people scroll past. When three TMC MPs join BJP within hours of resigning their Rajya Sabha seats, and then get handed fresh candidacy tickets from their new party before the ink is even dry, something bigger than routine politics is happening in West Bengal. This TMC MPs join BJP moment is already being read across Bengal as a turning point in how the state's opposition is reshaping itself.

Why This Actually Matters

If you are not deep into Bengal politics, here is the plain truth. Sushmita Dev, Sukhendu Sekhar Roy and Prakash Chik Baraik were not backbenchers. They were Trinamool Congress Rajya Sabha members, some of them vocal, visible faces of the party for years. When people like this walk out and straight into the arms of the ruling BJP, it tells you which way the internal wind inside Trinamool is blowing after its defeat in the 2026 West Bengal assembly elections. This is not abstract. It affects who represents the state in Parliament, who gets to speak for Bengal on the national stage, and how power actually gets redistributed after an election loss.

West Bengal politics rarely stays quiet for long, but this particular episode, three MPs at once, tickets handed out within hours, has genuinely surprised even seasoned observers of West Bengal politics and the way BJP West Bengal handles fresh entrants from rival camps.

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What Actually Happened, Explained Simply

Picture a household argument after a big loss. Some family members quietly start planning their exit before anyone even asks them to leave. That is roughly the mood inside Trinamool after its assembly poll defeat this year. A rebellion had already been brewing, reportedly gaining pace after Ritabrata Banerjee became Leader of Opposition with the backing of 57 MLAs. That internal churn spilled over into both houses of Parliament, and slowly, one by one, MPs began quitting.

Dev, Roy and Baraik resigned from the Rajya Sabha and from the Trinamool Congress weeks before this joining ceremony, no, that is not quite accurate either, let me correct that, their resignations trickled in over recent weeks rather than all on the same day. What happened on Thursday was the formal part, walking into BJP's Kolkata headquarters, receiving party flags from West Bengal BJP president Samik Bhattacharya, and stepping out as BJP members.

How The Defection Unfolded, Step By Step

• The trigger: Trinamool's defeat in the 2026 West Bengal assembly elections set off internal rebellion, with dozens of MLAs and eventually MPs breaking ranks.
• Individual resignations: Sushmita Dev, Sukhendu Sekhar Roy and Prakash Chik Baraik each resigned from their Rajya Sabha seats and from the party in the weeks before, citing separate personal and political reasons.
• The joining ceremony: All three formally joined the BJP together at the party's Salt Lake office in Kolkata, receiving flags from Bhattacharya in a ceremony that made the TMC MPs join BJP story an instant headline across Bengal.