As Tamil Nadu heads towards the 2026 Assembly election, the southern districts are once again emerging as the pivot of political calculations. Both the Dravida Munnetra Kazhagam (DMK) and the All India Anna Dravida Munnetra Kazhagam (AIADMK) have sharpened their focus on this region, determined not to repeat the arithmetic of 2021.

For the AIADMK, the stakes are existential. Under the late Chief Minister J. Jayalalithaa, the southern belt was widely regarded as the party’s impregnable fortress. That political equilibrium, however, shifted after her passing. The consolidation of caste blocs that once worked seamlessly for the party has since shown visible strain.

The leadership of Edappadi K. Palaniswami has faced the persistent criticism of the AIADMK being reduced to a “Gounder-centric” formation. Political observers argue that this perception led to fragmentation of votes among key communities — including the Mukkulathor, Nadars and Scheduled Castes — across nearly 58 Assembly constituencies in the southern districts, where identity politics plays a decisive role.

The 2021 election offered a preview of the consequences. V. K. Sasikala, T. T. V. Dhinakaran and O. Panneerselvam were not on the same page. In particular, Dhinakaran’s alliance with the Social Democratic Party of India was seen as cutting into the AIADMK’s traditional vote bank in several pockets.

With that experience in mind, there were indications that the Bharatiya Janata Party attempted to bring Sasikala, Dhinakaran and Panneerselvam onto a common platform this time. Resistance from the Palaniswami camp, however, reportedly stalled a comprehensive reunion. While Dhinakaran has moved closer to the broader alliance framework, disquiet lingers in the Sasikala and OPS camps.

Sasikala’s recent announcement that she intends to launch a new political party has triggered fresh speculation. Few view it as a straightforward bid for power. Rather, in political circles, it is being interpreted as a move that could hurt the AIADMK’s prospects in tightly contested southern constituencies. Her associates are believed to be reaching out to Mukkulathor outfits and community leaders to consolidate support in select seats.

Simultaneously, the DMK under Chief Minister M. K. Stalin is recalibrating its own strategy. There is talk in party circles of deploying Panneerselvam as a campaign narrative in the south — projecting him as a leader sidelined by the current AIADMK leadership. The attempt would be to frame the contest as one between inclusivity and exclusion within the opposition space.

The precedent is not lost on seasoned observers. In 2016, when Jayalalithaa opted to go it alone, she fielded Karunas — founder of the Mukkulathor Pulipadai — in Tiruvadanai, signalling the weight accorded to community equations. This election cycle, too, the DMK is said to be exploring tactical social coalitions. Sources suggest exploratory efforts to draw the SDPI, which previously aligned with Dhinakaran, into its fold.

There are also reports of outreach to multiple caste and community associations, with invitations being extended to Chennai for symbolic endorsements at party headquarters — optics that matter in a region where identity consolidation often precedes ballot consolidation.

Within the AIADMK, confidence rests on two assumptions: the strength of its alliance architecture and the prospect of anti-incumbency against the DMK government. Some leaders privately point to the possibility of central investigative agencies tightening scrutiny on DMK ministers as a factor that could alter the political climate, though such calculations remain speculative.

In sum, the southern districts have once again become the key to Fort St George. Is this a battle over Gounder consolidation? A renewed scramble for the Thevar vote bank? Or a third axis shaped by Dhinakaran’s manoeuvres? The answers will not be found in rhetoric or symbolism alone. As ever in Tamil Nadu politics, it is the final arithmetic on counting day that will determine who gains and who loses.