Madan Mitra quits Mamata faction posts and joins Ritabrata Banerjee's rebel camp in fresh Trinamool jolt

Verified key facts

• Madan Mitra joined the rebel camp led by Ritabrata Banerjee on July 15
• He resigned from all national and state committees under the Mamata Banerjee-led faction and quit as chief whip in the assembly
• Mitra said he remains a TMC member and will continue as Kamarhati MLA
• He suggested Abhishek Banerjee step aside for six months to a year
• Rival factions plan separate Martyrs' Day programmes on July 21

A veteran crosses over

Senior Trinamool Congress MLA Madan Mitra joined the party's rebel camp on July 15, in the most prominent crossover since the organisation split into rival factions. Business Today reported that Mitra resigned from all national and state committees functioning under the Mamata Banerjee-led faction. He also stepped down as the party's chief whip in the West Bengal assembly.

Mitra framed the move as an internal shift rather than a defection. He told reporters he remained in the Trinamool Congress and would continue as the MLA from Kamarhati, according to The Tribune. 'I have changed my room, not my house,' Republic World quoted him as saying.

The Federal reported that Mitra quit key roles under what rebels call the 'Kalighat TMC', the faction aligned with Mamata Banerjee. His exit from the whip's post takes effect immediately. The assembly's procedural arithmetic now depends on which faction the chair recognises for whip appointments.

Why Mitra's move matters

Mitra is among the Trinamool's most recognisable mass leaders and was for years a trusted lieutenant of Mamata Banerjee. The Tribune described his switch as the most significant crossover since the organisational split surfaced publicly. His departure signals that the rebellion now reaches the party's old guard.

The former state minister has held organisational charge across several election cycles. His public profile, built on mass events and constant local presence, gives the rebel camp a seasoned campaigner. The Federal noted that he gave up key posts while keeping his legislative seat.

The Kamarhati MLA also carries weight in North 24 Parganas, a district where the Trinamool's organisation remains dense despite the assembly defeat. Local units often follow established leaders during splits. Both factions will read his move as a test of where district-level networks lean.

The rebellion and its leader

The rebel camp is led by Ritabrata Banerjee, the former Rajya Sabha MP who now serves as Leader of the Opposition in the West Bengal assembly, according to The Tribune. The rebellion grew out of resistance to the expanding influence of party general secretary Abhishek Banerjee.

The Week reported that the split deepened after Ritabrata Banerjee and his supporters claimed control of the party headquarters and announced a parallel organisational structure. The two factions are now preparing separate programmes for July 21, the party's annual Martyrs' Day observance.

That date now doubles as a public test of strength. Attendance, speakers and district mobilisation on July 21 will be read as a proxy for control of the party machine. A unified observance had been held for nearly three decades before this year.

The Abhishek Banerjee question

Mitra coupled his exit with advice for the leadership. He suggested that Abhishek Banerjee step aside for six months or a year and let the rank and file rebuild the party, Business Today reported. He announced no move against Mamata Banerjee herself.

Criticism of the general secretary is now aired openly by other senior figures. Organiser quoted MP Kalyan Banerjee as blaming the 'Camac Street' set-up and the consultancy I-PAC for the assembly defeat and the split. The leadership has not issued a detailed public rebuttal.

The Week examined competing explanations for Mitra's timing, including pressure from central agencies and internal grievances over Abhishek Banerjee's style of functioning. Its analysis referenced past investigations involving Mitra. No new agency action against him has been reported alongside this move.

A party still absorbing defeat

The Trinamool's internal crisis follows its loss of power in May. The BJP won 206 of West Bengal's assembly seats, ending 15 years of Trinamool government, India TV reported. Mamata Banerjee lost her Bhabanipur seat to the BJP's Suvendu Adhikari.

Defections have hit the party in Parliament as well. Twenty of its 28 Lok Sabha MPs announced a merger with a Tripura-based party last month and pledged support to the NDA. The state rebellion and the parliamentary split are distinct, but both drain the same organisation.

For Mamata Banerjee, the challenge is sequencing. She must contest control of the party name and symbol, hold her assembly group together and rebuild district units at the same time. Each new crossover shifts resources and morale toward the rebel camp.

The wider backdrop is a new BJP state government facing an opposition at war with itself. A divided Trinamool affects committee posts, floor coordination and by-election readiness in the assembly. How the chair treats rival whip claims will set early precedent for the House.

What happens next

• Rival Martyrs' Day programmes on July 21 as a public test of factional strength
• The assembly chair's decision on whip recognition after Mitra's resignation
• Possible further crossovers from the Mamata-aligned faction to the Ritabrata camp
• Any Election Commission proceedings over the Trinamool name and symbol

Mitra says the house is unchanged and only the room is different. Whether voters accept that framing will not be tested before the next electoral cycle. The more immediate contest is organisational, and July 21 is now its first scheduled round.

Sources

• Business Today - TMC veteran Madan Mitra joins rebel camp, comments on Abhishek Banerjee (15 July 2026)
• The Tribune - TMC MLA Madan Mitra joins Ritabrata-led rebel camp, quits Mamata faction's organisational posts (15 July 2026)
• The Federal - Mamata loyalist Madan Mitra switches to Ritabrata's rebel camp, quits key TMC roles (15 July 2026)
• The Week - Decoding Madan Mitra's move to the Ritabrata camp of the TMC (15 July 2026)