Dhayaananth Karthick MB, the State Secretary of the National Students’ Union of India (NSUI) in Tamil Nadu, resigned on Thursday, expressing a deep sense of betrayal following the Congress party's decision to ally with Tamilaga Vettri Kazhagam (TVK), distancing itself from the Dravida Munnetra Kazhagam (DMK). In an open letter published in The Indian Express, Karthick criticized the Congress leadership for what he termed 'opportunistic backstabbing,' particularly after the DMK's steadfast support during challenging times for Congress in 2014 and 2019. He highlighted that DMK leader MK Stalin had publicly stood by Rahul Gandhi during these crises, and questioned the decision to align with TVK, a party he believes lacks political credibility. Karthick emphasized that the alliance seems more about projecting Rahul Gandhi as a potential Prime Ministerial candidate for South India rather than being rooted in principled politics. His resignation comes at a crucial juncture for the INDIA bloc in Tamil Nadu, as the Congress reevaluates its strategy ahead of the 2026 assembly elections, potentially ending its long-standing partnership with the DMK.