Most legal challenges to redistricting maps based on population deviation center around deviations that are too large. However, there are a handful of cases in which a court has found a map with minimal deviations (under 10%) to be unconstitutional. What is minimal? The equal population or “one-person, one-vote standard requires general population equality between districts, but there is no precise number or percentage that defines constitutionality. Instead, the Supreme Court interprets this constitutional requirement for congressional districts to mean “strict equality,” and for legislative and other local maps, districts need only to be “substantially equal.” In practice, a clear…