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           SCongressionaI
               a Research Servi e






Allen v. Milligan: Supreme Court Holds That

Alabama Redistricting Map Likely Violated

Section 2 of the Voting Rights Act



Updated September 29, 2023

On June 8, 2023, the Supreme Court in Allen v. Milligan affirmed two federal district court rulings that
preliminarily enjoined the State of Alabama from holding elections under its congressional redistricting
map because the map likely violated Section 2 of the Voting Rights Act (VRA). The Court also reaffirmed
the constitutionality of Section 2, as construed by its 1986 decision in Thornburg v Gingles, establishing
three preconditions for challenging a redistricting map under Section 2.
Section 2 of the VRA generally prohibits any voting law or practice, including a redistricting map, that
results in the denial or abridgment of the right to vote based on race, color, or membership in a language
minority group. In accordance with Gingles, Section 2 may require the creation of one or more majority-
minority districts-in which a racial or language minority group comprises a voting majority-to avoid
minority vote dilution. In this case, the district courts preliminarily enjoined Alabama election officials
from conducting congressional elections using the challenged map after finding that the challengers were
substantially likely to prove that the map violated Section 2 of the VRA, and ordered Alabama to revise
the map to contain a second majority-Black district to comport with Section 2.
This Legal Sidebar discusses the Court's ruling in Milligan and subsequent litigation in that case, and
concludes with an analysis of considerations for Congress. An earlier CRS product, Supreme Court
Agrees to Hear Voting Rights Act Challenge to Congressional Redistricting Map and Stays Lower Court
Ruling: Implications for Congress, provides background on Section 2 of the VRA and related Supreme
Court precedent, as well as the lower courts' procedural history and decisions.


Supreme Court Ruling in Allen v. Milligan

By a 5-4 vote, the Supreme Court in Allen v. Milligan affirmed a decision by a three-judge federal district
court panel, along with a related federal district court ruling in Allen v Caster, that preliminarily enjoined
Alabama  election officials from holding elections under the state's 2021 congressional redistricting plan
because the plan likely violated Section 2 of the VRA. (This Sidebar, like the Court in Milligan,
collectively refers to the two lower courts as the district court.) Chief Justice Roberts wrote the majority
                                                                Congressional Research Service
                                                                https://crsreports.congress.gov
                                                                                    LSB11002

CRS Legal Sidebar
Prepared for Members and
Committees of Congress

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