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Map Archive

Past Congressional and State Legislative Shapefiles

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 - 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

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...

Redistricting Weekly: July 28 - August 3, 2022

This week's top redistricting news.

Significant Mapping Developments Montana Montana’s redistricting commission advanced four legislative plan proposals for public comment. State News Arizona A new report examines the ...

Redistricting Weekly: July 21 - July 27, 2022

This week's top redistricting news.

National News Redistricting News A non-profit organization filed a federal lawsuit challenging the U.S. Census Bureau’s 2021 congressional reapportionment as violating the requirements of ...

Redistricting Weekly: July 14 - July 20, 2022

This week's top redistricting news.

New ARP Content Cook Political Report Announces PVI Formula Cook announced their new Partisan Voter Index formula which weighs the 2020 two-party presidential election results 3-to-1 over t...

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,...

Redistricting Weekly: July 7 - July 13, 2022

This week's top redistricting news.

National News Redistricting News The 2022 Cook Partisan Voting Index has been released . It covers the 50 states and all post-redistricting congressional districts. In a surprise move the fo...

Redistricting Weekly: June 30 - July 6, 2022

This week's top redistricting news.

National News Redistricting News The electoral landscape for the U.S. House of Representatives is set for this year as all fifty states have a congressional map in place for the 2022 electi...

Redistricting Weekly: June 23 - June 29, 2022

This week's top redistricting news.

Congressional Redistrict Update With Louisiana's congressional plan back in place, all 50 states now have legally operative congressional plans for the 2022 elections. New ARP Content ...

Redistricting Weekly: June 16 - June 22, 2022

This week's top redistricting news.

State News Kansas Kansas’s Supreme Court issued its full opinions upholding the state’s enacted congressional and legislative plans as constitutional. Louisiana After the district...


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