In a significant blow to the Trinamool Congress (TMC), MP Rukmini 'Koel' Mallick tendered her resignation from the Rajya Sabha on Thursday, July 16, 2026. Meeting the Rajya Sabha Chairman, Ms. Mallick submitted a formal letter stating, "I do hereby resign from the membership of Rajya Sabha, which may please be accepted with immediate effect."

A Pattern of Exodus

Mallick's departure is not an isolated incident but part of a worrying trend for the Mamata Banerjee-led party. Since the TMC was ousted from power in West Bengal, four of its members have vacated their seats in the Upper House. The sequence of resignations has sent shockwaves through the political establishment, suggesting internal fractures within the party leadership.

The Context of Political Instability

The resignation follows the exits of prominent TMC figures, including Sukhendu Shekhar Ray, Susmita Dev, and Prakash Chik Baraik. The timing of these departures, occurring shortly after the party lost its grip on the West Bengal state government, points toward a period of intense soul-searching and perhaps a realignment of political loyalties within the state.

Implications for the Trinamool Congress

While Ms. Mallick expressed her gratitude to the Deputy Chairman and the Rajya Sabha Secretariat for their cooperation during her tenure, the underlying cause remains a subject of intense speculation. Political analysts suggest that the loss of state power has triggered a domino effect, where disillusioned lawmakers are seeking new political trajectories. The ability of Mamata Banerjee to consolidate her remaining strength will be crucial in determining the party's survival in the upcoming electoral cycles.