Kalchini is a Scheduled Tribe (ST)-reserved Assembly constituency in Alipurduar district, defined by tea garden labour settlements, tribal-majority rural belts, forest-fringe villages, and border-proximate zones. Electoral behaviour is shaped by plantation wage dynamics, tribal consolidation depth, forest-rights sensitivity, and mobilisation symmetry across dispersed settlements. Psephologically, Kalchini functions as a plantation-heavy ST seat with moderate volatility influenced by labour alignment and turnout discipline.