The frenzied, fanatical politics of Tamil Nadu, India. ... Before she went into politics, Jayalalithaa was the most popular Tamil movie actress of her time, the heroine in more than 100 films. She followed the model of her mentor and co-star, an actor-politician named Marudhur Gopalan Ramachandran but more commonly known by his initials M.G.R. He ruled Tamil Nadu for 11 years, and since his death in 1987, Jayalalithaa and her archenemy, a wily 92-year-old screenwriter named Muthuvel Karunanidhi, have taken turns running the state. As the head of the D.M.K. — the party to which M.G.R. belonged until their rivalry forced a split — Karunanidhi has built a cult following on par with Jayalalithaa’s. The two of them rule as if in a melodrama, having each other arrested, dropping snide insults and wild accusations, destroying each other’s pet projects. The D.M.K. and the A.I.A.D.M.K. have almost no policy differences, but no other party can gain a foothold.