If you want an idea of what might happen to the Dravida Munnetra Kazhagam (DMK) or indeed, politics in Tamil Nadu after the demise of DMK leader Muthuvel Karunanidhi this week, a hard look at Maharashtra might help. There are striking resemblances between the DMK and the Shiv Sena, the demise of whose supremo, Bal Thackeray, changed the course of Maharashtra's politics.