Since the founding of the republic, congressional and legislative district borders have been updated every ten years.
Each district must have an equal population. Contiguous or connected lines are required. Minority voting power cannot be reduced through redistricting. District boundaries cannot be determined primarily by race.
How are congressional districts for the House of Representatives determined in the majority of states? The federal government conducts a census every ten years (decennial census). State legislatures modify the size and number of congressional districts in each state based on the findings of this census.
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