In India’s West Bengal state, the beloved fish has leapt from the kitchen table to the campaign trail, becoming an unexpected flashpoint in a fiercely contested election. For Bengalis, fish is not merely food. It is intrinsic to the Bengali identity and pride. Its aroma drifts from roadside fryers, and it is a must at wedding feasts and festival spreads. Now, as the state of over 100 million people gears up for polls on April 23 and 29, the slippery staple has also become political...