Bihar Assembly Polls 2025: Every election, Bihar votes across 38 districts, yet power has an uncanny pattern. Cross a certain invisible line, and you’ll know where the next Chief Minister is more likely to come from. Has geography quietly decided Bihar’s politics more than ideology or caste?

For decades, Bihar’s power map has tilted unevenly across the Ganga. The river, which cuts the state into two distinct halves, also divides its political fate. North Bihar, the land of the Kosi, the sugar belt, and the migrant worker, has often produced mass movements, but not enduring chief ministers. South Bihar, drier, urban, and better connected, has given the state its longest-serving rulers. Somewhere along this geographic split lies what many call the ‘CM Line’.

From Dr Sri Krishna Sinha, Bih

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