India, May 24 -- Three weeks after the Bharatiya Janata Party ended Mamata Banerjee's 15-year rule in West Bengal by winning 207 of the state's 294 Assembly seats, her Trinamool Congress is convulsing from within. What began as murmurs of post-poll recrimination has hardened into something far more dangerous: a structural implosion, driven by grassroots fury, senior-level rebellion, and a corrosive factional divide at the very top of the organisation.

The scale of the defeat was stunning. The BJP secured more than a two-thirds majority, consigning the TMC to the Opposition benches and stripping Banerjee of the Chief Minister's chair she had held since 2011. She lost her own seat in Bhabanipur to rival Suvendu Adhikari-a humiliation that ...