Following up on LLB’s SCOTUS tackles constitutionality of partisan gerrymandering, here’s a snip from the summary for Redistricting Law: Background and Recent Court Rulings (March 23, 2017 R44798):
In addition to various state processes, the legal framework for congressional redistricting involves constitutional and federal statutory requirements. Interpreting these requirements, in a series of cases and evolving jurisprudence, the U.S. Supreme Court has issued rulings that have significantly shaped how congressional districts are drawn and the degree to which challenges to redistricting plans may succeed. As the 2020 round of redistricting approaches, foundational and recent rulings by the Court regarding redistricting are likely to be of particular interest to Congress. This report analyzes key Supreme Court and lower court redistricting decisions addressing four general topics: (1) the constitutional requirement of population equality among districts; (2) the intersection between the Voting Rights Act and the Equal Protection Clause; (3) the justiciability of partisan gerrymandering; and (4) the constitutionality of state ballot initiatives providing for redistricting by independent commissions.