2020 United States Elections

Congressional and State Legislative District Boundaries

Ballotopedia State-by-State Redistricting Procedures
Ballotpedia is an online encyclopedia of American politics and elections
Pennsylvania, gerrymandered: A guide to Pa.'s congressional map redistricting fight
Philly.com timeline of Pennsylvania redistricting.
The Gerrymandering Project
FiveThirtyEight - Redistricting has a huge effect on U.S. politics but is greatly misunderstood. This project uncovers what’s really broken, what's not and whether gerrymandering can (or should) be killed.