The ruling DMK has been pushed onto the backfoot in Tamil Nadu. In a first, a senior DMK minister has been convicted of graft. K Ponmudy, already convicted in 2016, had the verdict overturned smartly after the party came back to power in 2021. But the wheels of justice, known to roll along slowly, caught up with him. Priding itself on having nil convictions in its long rule, the DMK used to deride the AIADMK for corruption cases, including those against J Jayalalithaa, in some of which she was convicted and did go to jail. But the smart recovery of convicted Ponmudy may not have escaped the eyes of the Madras High Court. And now other senior ministers are running scared. Having resorted to legal legerdemain to stay in power, the likes of Thangam Thennarasu, S Raghupathy and Anita Radhakrishnan are now worried if their cases would be raked up again. They are hoping that Ponmudy’s appeal to the top court would bear fruit quickly as there is an issue of latent bias in the ruling by tough judge G Jayachandran. Another uncompromising judge in Anand Venkatesan has been posted to take charge of cases against elected representatives and serious judicial action is on the cards. Tamil Nadu’s institutionalised corruption, that has enriched ruling families and close aides of both Dravidian parties, may be exposed again.