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Redistricting Plan

Illinois Proportional Representation Plan

Picture of the districting plan
Author: Mary-Claire Spurgin
Redistricting Principle(s) Prioritized: Proportional Representation
Date: Apr 4, 2022
This plan was designed primarily with the intention of ensuring proportional representation of the two major political parties in Illinois. The specific goal of this map was to create a congressional delegation whose partisan composition mirrored the partisan share of votes in Illinois, and it succeeded in that goal: Over the last decade, the average presidential vote share has been 57% Democratic and 40% Republican. The proposed map creates a congressional delegation that is 59% Democratic and 41% Republican, so it is almost entirely proportional with Illinois’s partisan composition. The creation of this map was also guided by the general principles of good redistricting, including drawing compact districts and avoiding splits of political subdivisions and communities of interest wherever possible.
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