The United States Constitution, Article I, Section 2 requires congressional apportionment to be based on an “enumeration” of the U.S. population. However, the Constitution is silent on what data is to be used for redistricting.
The standard practice in the states, over the last few decades, was to use the Federal Decennial Census Data.
22 states explicitly require the use of census data for legislative and/or congressional redistricting.
17states do not explicitly identify a data source for legislative and/or congressional redistricting.
5 states allow for the possibility of using other data sources for their redistricting, depending on circumstances.
Six states do not fit the categories above: New York, Ohio, Arkansas, Hawaii, Texas ad Indiana.
See More About Specific State's Redistricting Practices at: https://www.ncsl.org/research/redistricting/redistricting-and-use-of-census-data.aspx #Census #Redistricting #Gerrymandering
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