As Tamil Nadu Assembly elections of 2026 get closer, the DMK versus centre fight is all set to get more intense. The NEET controversy in Tamil Nadu took a pivotal turn today as Chief Minister M K Stalin has criticised Presidential refusal to exempt the state from the exam, labelling it a 'dark chapter in federalism.' The Assembly's push for a NEET-free medical admission process has faced stiff resistance. Meanwhile, opposition party AIADMK has also accused the ruling DMK of grandstanding without delivering on promises. The BJP meanwhile has said the DMK is only scared of losing 2026 which is why it's raising these issues and attacking the centre, and that it won't succeed. From the NEP to the three-language formula, to the alleged interference of the governor to NEET and a whole range of other matters, why is federalism key to the DMK's battle against the BJP, and will it work?