Reference

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,...

Maps  |  National

Party Control Maps (1960-2020)

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

Redistricting Glossary: Geography & Map Drawing

Redistricting terms related specifically to geography and drawing maps.

Block Assignment File The file format for many of the geographic products that the Census Bureau provides to states and other data users containing the small area census data necessary for leg...

2020-2022 Redistricting Deadlines

Below are the congressional and legislative redistricting deadlines for each state. Congressional Redistricting Deadlines 2021 Deadline These six states face a 2021 redistricti...

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...

Maps  |  National

2020-2022 Redistricting Deadlines

Redistricting Deadlines - Congressional Redistricting Deadlines - Legislative

Maps  |  National

Apportionment Maps (1960-2020)

2020 Congressional Apportionment 2020 Bubble Seats Apportionment Changes: 2000 - 2020 2010 Congressional Apportionment ...

2020-2022 Legislative Deadlines

Legislative 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 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...

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