One can begin answering that query by studying the course of the river Cauvery. For with it is entwined, both metaphorically and literally, the life and politics of the AIADMK general secretary. Jayalalitha was born on the banks of the Cauvery in Mysore. In '82, she performed a dance drama Cauvery thanta Kalaiselvi (The Artist gifted by Cauvery) in Madurai during the AIADMK'S tenth anniversary. This marked her formal entry into politics. A decade later, in '92, as the chief minister of Tamil Nadu, she went on a protest fast against the Narasimha Rao government for not solving the century-old Cauvery dispute. Then it was the BJP's turn. The tripartite agreement in August '98 was like a thorn in Jayalal-itha's flesh. She felt that her status as a BJP ally had been undermined, and that the party had cheated her by allowing her bete noire, chief minister Karunanidhi, to walk away with the cake she had been baking so long. The agreement resulted in the first major difference of opinion between her and the saffron party, which finally led to the collapse of the BJP government. There is, however, more to Cauvery and its links with Amma's fortunes than merely that. The river divides the state into nearly two equal halves. While south of Cauvery, Jayalalitha's political currency is very high, to its north it is negligible.