Answer:
Equal Population is the constitutional principle that requires periodic redistricting in the first place. Before courts recognized this legal principle, states redrew political boundary lines on their own schedules, if at all. Three landmark cases changed that in the mid-'60s. Today, equal population is all about drawing a new map with relatively equally populated districts. Since the mid 60's the question has always been how much deviation from perfect population equality is allowable.
Explanation:
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