TMC Split: How Mamata Banerjee Lost Bengal and May Lose Her Party
In the span of barely five weeks after its historic electoral rout in the May 2026 West Bengal Assembly elections, the All India Trinamool Congress — a party synonymous for nearly three decades with one indomitable woman — stands on the precipice of a legally ratified, organisationally engineered, and politically choreographed disintegration.
About sixty of its eighty MLAs have coalesced into a rebel legislative bloc, twenty of its twenty-eight Lok Sabha MPs have written to the Speaker seeking alignment with the NDA, and even its most celebrated loyalists are issuing him-or-me ultimatums from the floor of party press conferences. The proximate lightning rod is Abhishek Banerjee, Mamata Banerjee’s nephew, heir-apparent, and the man who turned the TMC into his own private political laboratory. But the deeper pathology goes to the very marrow of how the party was constructed — not on ideology, not on institutional scaffolding, but on the cement of proximity to power and the promise of financial enrichment. Once power moved, the cement dissolved.
This deep dive report examines, in unflinching and integrated detail, the structural, personal, legal, and strategic dimensions of the TMC crisis; tests the argument that this is, at its core, a scramble for self-preservation rather than principled political realignment; and attempts to map out a credible trajectory for both Mamata Banerjee and Bengal politics in the short and medium terms.
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The Earthquake That Shook Bengal
The earthquake registered on 4 May 2026, when the BJP swept the West Bengal Assembly elections with a decisive 207 seats in the 294-member House, reducing the once-mighty TMC to a rump of 80 MLAs. Mamata Banerjee, who had governed Bengal for fifteen uninterrupted years and twice delivered to the BJP its most humiliating defeats in eastern India, lost her own Bhabanipur seat to Suvendu Adhikari by a margin of 15,105 votes. The BJP’s vote share surged from 37.97% in 2021 to 45.92%, while the TMC’s collapsed from 48.02% to 40.68% — a 7.95-percentage-point voter swing that the commentariat had underestimated almost to the last.
Five structural forces converged to deliver this verdict: the Election Commission’s SIR-driven clean-up of voter rolls, a fierce anti-appeasement sentiment among demographic segments the TMC had taken for granted, the aftershocks of the RG Kar Medical College rape-murder case that had shattered the party’s moral standing with the urban middle class, the 7th Pay Commission promise for state government employees, and a mountain of anger accumulated over TMC’s school jobs and coal scams that had been festering through the courts for years.
The defeat was historic, but what followed was arguably more damaging. Within a month, as former Trinamool Rajya Sabha member Jawhar Sircar — perhaps the most eloquent insider-outsider observer of the TMC’s arc — told a media outlet, about sixty of the party’s eighty MLAs had staged what he characterised as a coup in the state assembly, announcing themselves as the principal opposition with a new leader, former CPI(M) figure turned TMC latecomer Ritabrata Banerjee. Twenty of the TMC’s twenty-eight Lok Sabha MPs simultaneously wrote to the Lok Sabha Speaker expressing their desire to align with the NDA, and three Rajya Sabha MPs resigned in rapid succession. In a single month, the party that Mamata Banerjee had founded in 1998, nurtured through fifteen years of grinding opposition politics, and brought to near-total dominance in 2021, appeared to be haemorrhaging its institutional existence from every artery.
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The Abhishek Problem: A Sanjay Gandhi in Bengal
To understand why the rebellion crystallised with such velocity, one must understand the figure at its epicentre: Abhishek Banerjee, thirty-eight, Diamond Harbour MP, TMC National General Secretary since 2021, and the man the party’s own spokesman had once publicly declared would be Chief Minister after 2036. Jawhar Sircar put it with characteristic bluntness when he described Abhishek as embodying the Sanjay Gandhi phenomenon — a second-generation dynast who entered politics not through the patient construction of a grassroots base but through the assertion of familial privilege and the aggressive deployment of organisational machinery.
The specific vehicle of Abhishek’s control was I-PAC, the political consultancy originally associated with Prashant Kishor, which Abhishek retained after Kishor’s exit and converted into what some describe as his personal army — a corps of young data analysts and field operatives posted across the party’s hierarchical layers from block level to Lok Sabha, not to support but to monitor and report. Candidates for everything from panchayat seats to Assembly tickets were no longer selected after consulting local leaders with years of ground-level investment; everything flowed through I-PAC’s feedback to Abhishek, and I-PAC’s staffers — some barely out of their twenties — exploited this leverage to coerce senior leaders into compliance on pain of negative assessments being filed upward. As a former Trinamool MLA from Malda put it with piercing economy: Abhishek Banerjee transformed Trinamool from a political organisation into a corporate entity, where I-PAC became the decision-making authority.
The result was a double displacement. Externally, the party’s traditional bottom-up mobilisation — the street-level muscle that had actually driven the 2011 revolution and the 2021 fortress-hold — was replaced by a top-down, data-driven model that alienated the very cadres who had bled for it.
Internally, veteran leaders who had been through the fire with Mamata Banerjee for decades — Suvendu Adhikari before his defection, Mukul Roy, and now a long list of others — found themselves bypassed, humiliated, or subjected to surveillance by consultants they could not remove. Kalyan Banerjee, a senior MP and advocate who had himself remained loyal as the rebellion erupted, captured this fury in the most personal terms available: I don’t like Abhishek’s arrogance; he destroyed TMC, he told reporters, adding a direct him-or-me ultimatum to Mamata Banerjee — she must choose between her nephew and veteran leaders like himself. When the party’s own chief whip starts issuing such ultimatums, it is no longer a rebellion at the margins; it is a crisis at the core.
Crucially, however, as Jawhar Sircar emphasised, the revolt against Abhishek inside the party was only one layer of a two-layer story. The other layer was external: Suvendu Adhikari, now the BJP’s Chief Minister of Bengal, had himself been pushed out of the TMC by Abhishek’s manoeuvring years earlier, and his ascension to power represented a delayed but devastating personal reckoning. The photograph of Ritabrata Banerjee meeting Suvendu in New Delhi days before launching the legislative coup was not coincidental theatre; it was the visible surface of an invisible architecture. Whether Suvendu pretends he knows nothing about it, Sircar said, he was chuckling his way all the way to the legislative assembly because he’s got his revenge.
Blood Thicker Than Party: Why Mamata Cannot Cut Abhishek Loose
The central question that preoccupies every observer of this crisis is deceptively simple: why can’t Mamata just dump Abhishek and save her party? The answer is neither sentimental nor irrational — it is structurally determined by the peculiar political dynasty she has built and the choices she made in its construction.
Mamata has no children and no spouse in politics. Abhishek is the son of her elder brother Amit and is, in the most literal sense, her only family in the political arena. The academic literature on the TMC’s evolution is explicit: for years, the TMC worked to simultaneously rejuvenate the party’s political orientation while advancing a long-unfolding project of political dynasticism whereby Abhishek was positioned as the heir to Mamata’s political kingdom. Having publicly and systematically groomed him, having given him the National General Secretaryship, and having handed him control of the party’s organisational architecture in the last eighteen months before the election, Mamata Banerjee cannot now perform a surgical separation from Abhishek without effectively confessing that she misjudged both the man and her own succession planning — an admission that would destroy whatever residual authority she retains.
There is also the legal dimension. Abhishek faces multiple investigations — in the coal scam, the Narada sting case, and other PMLA-related proceedings — and as Sircar made clear, in the new dispensation led by Suvendu, those investigations will not remain dormant. Mamata disowning Abhishek would not protect him from legal exposure; it would only strip him of the one shield that has kept the full prosecutorial machine at bay. Blood, in this instance, is simultaneously a personal bond and a shared legal exposure — which is why, as Sircar observed with his characteristic precision, she had to operate behind shades now; she can’t be putting his finger up on every bus and everything. The relationship has changed from dominance to mutual vulnerability, and that, paradoxically, makes it harder to rupture rather than easier.
Then there is the question of succession and legacy. For a first-generation regional founder — and Sircar correctly locates Mamata in this category, far more organically bound to her party’s identity than second-generation leaders like Chandrashekhar Rao or Naidu, who inherited established organisations — the party IS the founder. She named it. She built it. She bled for it.
The TMC is her autobiography in political form, and the prospect of losing it to a claimant who joined only five years ago, working with the blessing of the man who threw her out of her own constituency, is not merely a political setback. It is an existential humiliation.
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Principle or Panic? The Rebellion’s Hollow Core and the Operation Lotus Playbook
The rebellion has wrapped itself in the language of party renewal and democratic accountability — Mamata Banerjee is our leader but Abhishek must go — while its actual architecture tells an entirely different story. The trigger at the national level was not any ideological awakening. It was the replacement of Kakoli Ghosh Dastidar as Lok Sabha Chief Whip on 14 May, within days of the election results, with Kalyan Banerjee — a decision Kakoli took as a personal affront, writing publicly that she had met Mamata in 1976 and begun her political journey in 1984, and this is the reward she has received for four decades of loyalty. Seeing the exposed wound, the BJP moved. Home Ministry security for Kakoli was hastily elevated to Y-category. BJP leaders began making calls.
The mathematics of the anti-defection law explains the precision of what followed. Under the Tenth Schedule of the Constitution, if twenty of the TMC’s twenty-eight Lok Sabha MPs leave together and merge with another party, it does not constitute defection — it is a legally protected merger. Two-thirds of twenty-eight is exactly 18.67. The rebels claimed twenty — one more than the threshold, a single unit of legal insurance. This is precisely the same mathematical formula deployed to split the Shiv Sena and to poach seven AAP MPs in the Rajya Sabha — the same playbook, the same numbers, the same choreography. There is a name for this kind of precision: it is not courage, it is not principle, it is actuarial calculation.
Jawhar Sircar was blunter still, naming what he called the Bima TMC — the insurance-policy TMC: It’s a surrender to protect their own interests and to protect their own hide. Fifty of sixty of them are now, and more will join. They all have interests. They all have economic stuff going on here and there. For TMC leaders carrying the accumulated weight of a decade and a half of syndicate politics, coal scams, school jobs rackets, and cattle-smuggling cases, the choice between standing with a party in freefall opposition and seeking the portico shade of the ruling dispensation was not a philosophical dilemma — it was a survival calculation.
The rebel MLAs and MPs acquiesced and flourished under Abhishek’s machine when it was in power. They did not develop principles. They developed fear. The contrast with Jawhar Sircar is instructive and painful. Sircar quit in September 2024, when the TMC was still in government, when quitting cost him everything and gained him nothing tangible — no security upgrade, no prosecution shelter, no NDA nod. He quit because the RG Kar horror broke something in him morally. The contrast between that exit and the coordinated parliamentary manoeuvre of June 2026 — calibrated to the exact two-thirds threshold, timed with BJP security upgrades and contact calls — captures the moral distance between principled dissent and naked political survival.
This TMC crisis cannot be understood in isolation from the broader pattern. Operation Lotus — the BJP’s systematic playbook for dismantling regional parties after electoral defeat — has moved through its phases with the relentlessness of a long-term project. From the 2008 Karnataka buyout of independents, through the Maharashtra Shiv Sena split in 2022 and the AAP Rajya Sabha defections in April 2026, the methodology has been refined with each iteration: identify the disgruntled, provide legal immunity as the primary incentive, use central agencies to weaken those who resist, and deploy the anti-defection loophole to ensure the mathematics of the split give institutional cover. Henry Kissinger’s dictum applies with ruthless precision: the BJP eliminates its enemies, but it does not spare its allies either. The BJD, the Akali Dal, the PDP, the AIADMK, and the JD(U) all discovered this sequentially.
There is, however, an important nuance that distinguishes the TMC situation from the Maharashtra model. Several rebel faction members have stated their opposition to staking a legal claim to the party name and symbol. The BJP’s own Bengal state president Samik Bhattacharya has reportedly signalled that the party does not want TMC defectors in its ranks — a message that may reflect BJP ideological hardliners’ reluctance to absorb cadres with a very different political DNA. So the rebel MPs find themselves in a peculiar halfway house: seeking the shelter of the NDA’s portico without being formally invited through the front door — functioning, as Sircar put it, as half proposition, half opposition.
The Legal Labyrinth: When Does Mamata Lose Her Party?
The legal question is now as critical as the political one. Under para 15 of the Election Symbols (Reservation and Allotment) Order, 1968, when rival sections of a recognised political party both claim to be the original party, the Election Commission of India may decide — after hearing all parties — which faction is the recognised party entitled to the name and symbol.
The precedent from the 2023 Maharashtra Shiv Sena dispute is instructive but also cautionary: the ECI ruled in February 2023 that the Eknath Shinde faction was the official Shiv Sena and awarded it the bow and arrow symbol, on the reasoning that the legislative wing could not be viewed in isolation from the party organisation. The TMC’s iconic Jora Phool — the twin flowers that have graced Bengal’s political landscape for nearly three decades — could face a similar fate if the rebel faction activates this route.
The threshold criteria are demanding. According to The Week’s analysis, the rebels would need a majority not only among MLAs and Lok Sabha MPs but also among Rajya Sabha MPs, municipal and panchayat representatives, and, crucially, party office-bearers. The last category remains deeply contested.
Mamata Banerjee controls the party organisation; she founded it, registered it, and the party constitution vests supreme authority in her as chairperson. Constitutional expert Virag Gupta has observed that the ongoing TMC rebellion raises critical questions under the Tenth Schedule and will be a major test of whether a legislative majority can claim control of a legislative party despite opposition from the parent political organisation.
As Mahua Moitra argued — with characteristic sharpness — even if the rebels get their two-thirds parliamentary numbers, their legally protected option under the anti-defection law is a merger with another party, not a standalone claim to party identity. A merger means being absorbed into the BJP or the NDA, which the rebels have been careful to avoid declaring publicly — precisely because such a declaration would reduce their leverage to zero and expose them to the full glare of having betrayed their electoral mandate (41% of the vote) as TMC candidates. So they exist in the constitutional grey zone of NDA-aligned without formal merger — a position that gives them political oxygen for now but lacks legal durability.
The Maharashtra parallel is instructive in another, darker way. Uddhav Thackeray was defiant, declared he would rebuild, seemed confident, and had genuine mass sympathy — and yet, the institutional machinery ground inexorably against him. The party name, the symbol, the funds, the official machinery: all shifted to the Shinde faction. The TMC’s registered fund corpus reportedly exceeds Rs 1,000 crore — a prize of considerable magnitude. The legal battle for it will be protracted, expensive, and ultimately decided by institutional actors who are not insulated from political pressure.
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Who Is Left Standing with Mamata?
When the analytical dust settles, the loyalist roster is telling. Shatrughan Sinha, the Asansol MP and veteran Bollywood actor, has been the most vocal loyalist, declaring he was, he is and he will remain with Mamata Banerjee. His loyalty is personal and genuinely felt, but his political weight in Bengal is negligible. He carries no organisational mass, no cadre network, and no ideological anchor in the Bengal political soil.
Derek O’Brien and Mahua Moitra complete what Sircar described as the residual loyalist core. Sircar’s assessment was clinical: those who had no other careers, whose entire familiarity with the people lay in their power within the party, cannot leave because Ritabrata and his lot won’t even take them. There are also individuals of genuine honour in the remnant camp — Sircar mentioned Sovandeb Chattopadhyay as an honourable man who has principled reasons to remain. But the arithmetic of mass mobilisation does not run on individual honour.
Abhishek himself has no option but to retreat, regroup, and operate from the shadows of this new reality. His properties have been raided, his I-PAC co-founder arrested, and he faces the immediate prospect of intensified legal scrutiny from the Suvendu-led administration. His value to Mamata at this point is paradoxical: his presence is the stated reason for the rebellion, and yet he cannot be detached without dissolving the very entity that gives Mamata Banerjee her political reason for being.
The Invisible Crisis: Bengal at the Grassroots
What neither the rebel MPs nor the loyalists are discussing with any candour is the catastrophic state of West Bengal at the grassroots level — and this silence is itself politically significant. Fifteen years of TMC rule were not simply fifteen years of governance; they were fifteen years of a systematically decentralised extraction model in which local strongmen — the panchayat-level functionaries, the syndicate operators, the block-level party bosses — enriched themselves within a system that provided upward cover in exchange for political loyalty and vote delivery. The schools scam, the ration distribution scam, the cattle smuggling operation, the teacher recruitment racket, the sand and coal syndicates — these were not aberrations; they were the operating system. When Sircar says that the TMC was stuck together not so much by ideology but by a desire to possess power and a desire to possess wealth, he is describing an extraction architecture, not a governance one.
The ordinary Bengali voter — the schoolteacher who couldn’t get the job she was owed, the small contractor cut out of a government tender without paying the syndicate cut, the RG Kar patient whose relatives saw a trainee doctor’s rape-murder become a political controversy rather than a human tragedy — has been watching this drama with something between disgust and exhausted disbelief. The BJP won because it channelled that disgust into an electoral majority. But winning an election with 207 seats and inheriting an administration riddled with the residues of fifteen years of systematic misgovernance — unpurged bureaucratic networks, captured local bodies, a judiciary stretched to breaking point with pending cases — is a very different thing from delivering transformative governance. The BJP’s early actions are politically potent signals, but Bengal’s grassroots problems are structural and will outlast any choreographed enforcement theatre.
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Three Scenarios for Bengal’s Political Future
In the short term — the next six to twelve months — the most probable scenario is a protracted legal-political spectacle that mirrors but exceeds the Maharashtra sequence in its complexity. The Election Commission will be approached; the Tenth Schedule proceedings will be initiated before the Speaker; the Calcutta High Court and, ultimately, the Supreme Court will be drawn into the vortex.
During this period, the rebel faction will continue to exist in its legally ambiguous NDA-aligned but unmerged state, drawing on the BJP’s administrative goodwill for constituency-level delivery while claiming to be the Prakrita Trinamool — the Real Trinamool. Mamata Banerjee has already approached the Calcutta High Court against the Speaker’s recognition of Ritabrata Banerjee as Leader of Opposition.
Mamata Banerjee’s meetings with Sonia Gandhi in Delhi — reportedly the most sustained personal engagement between them in years — suggest an exploration of a strategic alignment that would give the TMC a national platform and resource base even as its Bengal organisational ground erodes. Speculation about Mamata being offered the Congress National Vice Presidency and Abhishek a General Secretaryship were officially denied but not implausible as trial balloons. With the Left holding only one seat and the Congress two, Mamata and her twenty-odd remaining Lok Sabha MPs represent the INDIA bloc’s only Bengal footprint — a fact that gives her leverage she would not otherwise possess in post-election negotiations.
In the medium term — one to three years — three scenarios compete for probability. The first, and most convenient for the BJP, is a complete Maharashtra-model replication: the rebel faction secures the TMC’s name and symbol through the ECI, is formally recognised as the real TMC, and Mamata Banerjee either fades into political irrelevance or merges into the Congress as a supplicant rather than an equal. This scenario is not impossible, but it is not inevitable either. The ECI’s standards for recognising a split are contested, the Supreme Court’s jurisprudence on the Nabam Rebia case has made the disqualification and split architecture more complicated, and even the BJP’s own Bengal unit has signalled reluctance to absorb the rebel MPs wholesale.
The second, and historically more resonant, scenario draws on Mamata Banerjee’s own biography. In 1997-98, she was expelled from the Congress, began with hardly any flags, hardly any money as Sircar recalled, was dismissed by everyone as 5% of the Congress — and within a decade had consumed her mother party entirely. She spent fifteen years in the most grinding opposition politics Bengal has seen since the Left Front era, survived every attempt to domesticate or eliminate her, and swept to power in 2011 on a wave of popular energy that even her most sympathetic supporters had not fully anticipated. She is not an ordinary politician facing an ordinary reversal. She is a first-generation founder with a genuine mass connect that the rebel faction — which does not possess a single leader with the charismatic capital she carries — cannot replicate.
The third scenario is the most unsettling for everyone: an extended, low-grade political zombification in which the TMC loses its symbol but retains its founder’s personal brand; in which the rebel faction holds the legal party shell but lacks the popular legitimacy to win elections on its own; in which Bengal politics fragments into a BJP-dominant state with a confused, multi-fractured opposition that cannot coalesce around a single vehicle. This is the Bihar-in-its-worst-years scenario — factional entropy in a state too important and too complex for factional entropy to serve it well.
The Moral Reckoning Nobody Is Having
There is a final dimension to this crisis that the television panels and the legal analyses consistently evade, and it is the most important one. Indian politics — and Bengali politics in particular, with its long tradition of ideologically grounded political activism — has arrived at a moment of terminal moral exhaustion. The men and women who are today filing letters to the Lok Sabha Speaker about directionlessness and Abhishek’s arrogance are the same men and women who stood on platforms and cheered every autocratic overreach. They acquiesced when the panchayat elections were captured through violence and money in 2023. They stayed silent when Partha Chatterjee was arrested with about fifty crore rupees in cash. They did not resign when the RG Kar rape-murder became a political football. They raised no principled objection when I-PAC’s twenty-five-year-old staffers were telling elected leaders how to vote and think. Power was sufficient. Enrichment was sufficient.
Now power is gone and enrichment is threatened, and suddenly there are principles. The rebel bloc’s claim to be the custodians of the real Trinamool — the Prakrita Trinamool — is an insult to language. What they are the custodians of is their own survival, and the only force keeping them honest is the accidental constraint of a constitutional threshold. The BJP leadership itself is not acting from democratic conviction; Operation Lotus is a machine for the permanent extension of power, and its operators have stated — through Kissinger’s logic as much as their own — that there is no ally that cannot become a target when the utility calculus changes. Neither the rebels nor their current hosts have principles at stake. What they have are calculations, and the calculations are brutal.
Bengal, meanwhile, carries the accumulated burden of the failure of three consecutive political formations — the Left Front’s decay into calcified authoritarianism, the TMC’s corruption-soaked promise of change, and now the question of whether the BJP can actually govern a state as complex and contentious as West Bengal with any consistency.
The grassroots problems — educational degradation, employment collapse, administrative capture, constitutional overreach in local governance — will not be addressed through legal-political chess games over party symbols and anti-defection percentages. They require governance, which requires courage, which requires something neither the rebels nor their patrons have yet demonstrated in Bengal.
Mamata Banerjee may yet surprise everyone. She has done it before — in 1998, in 2011, in 2021 — and those who write her off too completely will recall with some chagrin that this is a woman who fought the CPI(M) for fifteen years with nothing but her own extraordinary will and the credibility of sustained personal sacrifice. But even if she stages the most improbable of political revivals, the TMC she rebuilds — if she does — will be a smaller, leaner, arguably more honest organisation stripped of the opportunists who have now departed with their briefcases and their insurance policies. That, in the deepest irony of this entire affair, may be the best thing to have happened to it.
Disclaimer : This story is auto aggregated by a computer programme and has not been created or edited by DOWNTHENEWS. Publisher: theprobe.in
