Blog

Behind the Lines - New York

The story of the most dramatic redistricting process of the 2021 Redistricting Cycle. How a commission under assault and a constitutional conundrum led to a fair map for New Yorkers.

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Behind The Lines - Maryland

Exploring Maryland's contentious redistricting process, the state's new precedent against partisan gerrymandering, a look into compactness measures, and if Maryland’s new map complies with that new precedent

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Cook Political Report Announces New Formula for Partisan Voter Index

The Cook Partisan Voter Index (PVI) has historically utilized the two-party presidential results of the last two previous elections, weighted equally, to calculate each cycle's PVI. Last week,...

Behind The Lines - Alabama

An in-depth look at Alabama's new congressional map, the litigation that followed, and what the U.S. Supreme Court's ruling could mean for the future of redistricting

Esri products such as ArcGIS StoryMaps have known compatibility issues with iOS devices. For an optimal user experience, please view this page on a non-iOS tablet, phone or desktop computer...

Behind The Lines

Examining some of the most consequential redistricting lawsuits of the cycle

Esri products such as ArcGIS StoryMaps have known compatibility issues with iOS devices. For an optimal user experience, please view this page on a non-iOS tablet, phone or desktop computer...

2021 Party Control Map - Expectations vs. Reality

Expectations At the beginning of the 2020 redistricting cycle, we published a blog post detailing who controlled the redistricting process in each state. But the realities of the cycle had oth...

2020 Census Count Errors & Congressional Apportionment

Census Report On May 19, 2022, the U.S. Census Bureau released the 2020 Census estimated overcount and undercount rates by State derived from the 2020 Post-Enumeration Survey (PES) . The PES ...

Modern Congressional Reapportionment (1960 – 2020)

Reapportionment changes from 1960-2020 Over the past seven reapportionments, 66 seats shifted from the Northeast and Midwest to the South and West. The Losers Northeast The Northeast regi...

Maps  |  National

Party Control Maps (1960-2020)

Post 2020 Election - Congressional Post 2020 Election - Legislative 2011 Redistricting Control 2001 Red...

2020-2022 Congressional Deadlines

Congressional redistricting deadlines affected by the 2020 Census data delay.

On February 12, 2021, the U.S. Census Bureau announced that the PL-94-171 2020 Census data that is necessary for congressional and legislative redistricting will not be delivered to the states un...

2020-2022 Commission Deadlines

Redistricting commission deadlines affected by the 2020 Census data delay.

On February 12, 2021, the U.S. Census Bureau announced that the PL-94-171 2020 Census data that is necessary for congressional and legislative redistricting will not be delivered to the states un...

2021 Redistricting Control

Redistricting control as of April 26, 2021.

Congressional Redistricting Republican Control (20 States - 187 Seats): Alabama, Arkansas, Florida, Georgia, Indiana, Iowa, Kansas**, Kentucky**, Mississippi, Missouri, Nebraska...


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