Allen v. Milligan: Supreme Court Holds That Alabama Redistricting Map Likely Violated Section 2 of the Voting Rights Act
Legal Sidebari
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
Congressional Research Service
2
opinion, which was joined by Justices Jackson, Kagan, and Sotomayor in full and Justice Kavanaugh in
part. (As discussed below, Justice Kavanaugh did not join Part III-B-1 of the opinion, which addressed
Alabama’s proposed change to the first Gingles precondition.) The Court held that the district court, in
finding that Alabama’s redistricting plan violated Section 2 of the VRA, had “faithfully applied” the
Court’s 1986 precedent in Thornburg v. Gingles and that it could not identify a reason to alter the district
court’s “careful and factual findings” nor a basis to disturb the court’s conclusions of law.
As stated by the Court in Milligan, Gingles has governed Section 2 cases since 1986 and establishes three
“preconditions” that challengers must satisfy to prove a Section 2 violation:
1. “the minority group must be sufficiently large and [geographically] compact to constitute
a majority in a reasonably configured district”;
2. “the minority group must be able to show that it is politically cohesive”; and
3. “the minority group must be able to demonstrate that the white majority votes sufficiently
as a bloc to enable it … to defeat the minority group’s preferred candidate.”
After meeting the three preconditions, according to the Court in Milligan, a challenger must then show,
“under the ‘totality of circumstances,’ that the political process is not ‘equally open’ to minority voters,”
as evidenced by several relevant factors. In considering the totality of circumstances, a relevant factor
includes “the extent of any history of official discrimination in the state … that touched the right of the
members of the minority group to register, to vote, or otherwise to participate in the democratic process.”
Agreeing with the district court, the Supreme Court concluded that the challengers’ claim against the
Alabama map would likely prevail under the Gingles preconditions. Specifically, the Court observed that
the challengers had presented 11 examples of redistricting maps that each contained two majority-Black
districts and that the evidence indicated that Black voters could constitute a majority in a second district
that was reasonably configured. Further, the Court agreed with the district court’s conclusion “that there
was ‘no serious dispute that Black voters are politically cohesive, nor that the challenged districts’ white
majority votes sufficiently as a bloc to usually defeat Black voters’ preferred candidate.’” Regarding the
totality of circumstances analysis, the Court likewise observed that the district court had correctly
determined that Black Alabamians are rarely elected to statewide office, that political campaigns are
“characterized by overt or subtle racial appeals,” and that Alabama’s “extensive history of repugnant
racial and voting-related discrimination is undeniable and well documented.”
Turning to the arguments proffered by the State of Alabama in support of the map, the Supreme Court
criticized the state for “attempt[ing] to remake” the Court’s Section 2 case law “anew.” According to the
Court, the state had proposed that the Court adopt a “race-neutral benchmark” standard that would be
ascertained by using computer technology to generate millions of possible redistricting maps in
accordance with “traditional districting criteria but to not consider race.” After determining “how many
majority-minority districts exist in each map,” among the millions of possible maps generated, the
mapmaker would calculate the median or average number of such districts, which would be considered
“the race-neutral benchmark.” As the Court explained, Alabama had argued for this benchmark to serve as
a point of comparison in Section 2 challenges because the maps generated to reach the benchmark did not
take race into consideration. That is, Alabama had maintained that in Section 2 cases, courts should
compare the number of majority-minority districts in a challenged map with the benchmark and, “[i]f
those numbers are similar,” then the challenged map “cannot have ‘deni[ed] or abridge[d]’ anyone’s right
to vote ‘on account of race’” because race was not taken into “account” in creating the benchmark. As the
Court observed, Alabama had proffered that the Section 2 requirement that political processes be “equally
open” was tantamount to prohibiting burdens on voting that were based on race, and, ergo, a redistricting
map that is similar to one that was created without racial considerations does not impose such burdens in
violation of Section 2.
Congressional Research Service
3
The Court majority identified several flaws with Alabama’s proposed standard, both in theory and in
practice. For example, the Court denounced the proposed standard for “run[ning] headlong into [the
Court’s] precedent” because compliance with Section 2 would be determined by whether a map
“resembles a sufficient number of race-neutral alternatives.” Instead, the Court instructed courts to
evaluate the “illustrative” redistricting maps that challengers are able to adduce under the first Gingles
precondition, which may indicate a possibility that the challenged map “has a disparate effect on account
of race.” The remainder of the Gingles factors will then help determine “whether that possibility is
reality,” the Court explained, by examining the existence of any polarized voting and the extent to which
the state has taken “racially discriminatory actions.” Further, the Court criticized the state for failing to
present a standard whereby Section 2 violations are ascertained “based on the totality of circumstances,”
as commanded by the statutory text. In contrast, the Court determined that the state’s proposed standard
would result in only one circumstance being considered, i.e., how the number of majority-minority
districts in the challenged map compares with the benchmark.
The Court majority also critiqued the state’s argument that the “race-neutral benchmark” standard was
necessary because the Gingles precedent “inevitably demands racial proportionality” in a redistricting
map and, therefore, conflicts with the express language of Section 2. (The last sentence of Section 2
provides “[t]hat nothing in this section establishes a right to have members of a protected class elected in
numbers equal to their proportion in the population.”) Rejecting Alabama’s reasoning, the Court said that
the Gingles precedent, “properly applied,” establishes significant constraints on proportionality, as
evidenced by the Court’s case law. To illustrate, the Court noted that Section 2 lawsuits “ha[ve] rarely
been successful” in recent years because racial segregation in housing has been decreasing across the
country, thereby impeding compliance with the first Gingles precondition of compactness.
Further, the Court majority disagreed with Alabama’s contentions that Section 2 does not apply to single-
member redistricting maps and is unconstitutional under the Fifteenth Amendment as applied to
redistricting. According to the Court, a holding that Section 2 does not apply to single-member
redistricting maps would be unreconcilable with over four decades of its precedents, which the Court was
unwilling to overturn. Observing that Congress is aware that judicial precedent has construed Section 2 to
apply to redistricting challenges, the Court emphasized that Congress could change the law should it
wish. However, the Court stated that “statutory stare decisis” informs the Court to follow precedent. (The
doctrine of stare decisis generally counsels that courts should adhere to precedent.) Similarly, the Court
determined that the text of Section 2, which expressly applies to any “prerequisite to voting,” supports
application of the law to single-member redistricting maps because “[i]t is hard to imagine many more
fundamental ‘prerequisites’ to voting than determining where to cast your ballot or who you are eligible to
vote for.” Finally, the Court rejected Alabama’s argument that the application of Section 2 to redistricting
exceeds Congress’s power to legislate under the Fifteenth Amendment because it applies only to
intentional discrimination. Dismissing that claim, the Court cited its 1980 ruling in City of Rome v. U.S.,
holding that its prior cases “foreclose any argument” that Congress does not have the power under the
Fifteenth Amendment to prohibit voting laws and practices that have a discriminatory effect.
As noted, Chief Justice Roberts wrote the opinion of the Court and Part III-B-1, which Justice Kavanaugh
declined to join. Therefore, three other Justices—Jackson, Kagan, and Sotomayor—joined Chief Justice
Roberts’s opinion in Part III-B-1 that addressed Alabama’s proposed change to the Gingles first
precondition. According to the Chief Justice in Part III-B-1, when evaluating a redistricting map under the
first Gingles precondition, a court must distinguish between evidence indicating that a map was created
with an awareness of racial considerations versus a motivation of racial considerations, emphasizing that
the former is permitted while the latter typically is not. Further, Chief Justice Roberts’s opinion
emphasizes that determining whether a majority-minority district can be created is a “quintessentially
race-conscious calculus” because “Section 2 itself ‘demands consideration of race.’” However, the
opinion cautions that race cannot be “the predominant factor” in creating a redistricting map absent “a
compelling reason” and concludes that, in the illustrative maps submitted by the challengers in this case,
Congressional Research Service
4
race did not predominate. Addressing Justice Thomas’s dissent, Chief Justice Roberts disputed the
contention that because they were drawn “with an express [racial] target in mind,” racial predominance
exists in all illustrative maps that challengers adduced under the first Gingles precondition. Instead, Part
III-B-1 concludes that, in accordance with the Court’s long-standing precedents, the argument that map
creators need to “be entirely ‘blind’ to race has no footing in our §2 case law.”
Concurring in all but Part III-B-1, Justice Kavanaugh emphasized, among other things, that the stare
decisis standard for overturning a statutory precedent such as Gingles, as compared with a constitutional
precedent, “is comparatively strict” because Congress and the President have the power to alter such
precedent through legislation. Therefore, even though “statutory stare decisis is not absolute,” Justice
Kavanaugh wrote that the legislative process, not the courts, should “updat[e] or correct[] … erroneous
statutory precedents.” Justice Kavanaugh also referenced a portion of Justice Thomas’s dissenting opinion
that argued that, even if Congress had the constitutional authority to enact Section 2 in 1982, the time
period for that authority has a limit. In response, Justice Kavanaugh opined that the State of Alabama did
not raise this argument, and therefore, he “would not consider it at this time.” Some have posited that this
aspect of Justice Kavanaugh’s concurrence might signal future challenges to Section 2 based on a
“temporal argument,” similar to the basis of the Supreme Court’s 2013 ruling in Shelby County v. Holder.
In Shelby County, the Court invalidated Section 4 of the VRA, determining that while the law was
constitutional at one time, “things have changed dramatically” in the nearly 50 years since its enactment.
In a dissent, Justice Thomas, joined by Justices Gorsuch, Barrett, in part, and Alito, in part, maintained
that the Court’s ruling in Milligan misconstrued Section 2 of the VRA and that the Court interpreted the
law in an unconstitutional manner. Among other things, Justice Thomas argued that the Court’s reliance
on stare decisis in support of Section 2, in the context of single-member redistricting maps, is overstated
because the Court has invalidated only one such map under Section 2. Further, Justice Thomas maintained
that stare decisis should not be invoked to prevent reconsideration of Court precedent that was “based on
a flawed method of statutory construction from its inception.” Justice Thomas also contended that even if
Section 2 applied in this case, the Alabama congressional redistricting map should be upheld because in
applying a “race-neutral benchmark,” which he maintained is the appropriate benchmark in Section 2
cases, the challengers cannot justify the creation of two majority-Black districts.
In a separate dissent, Justice Alito, joined by Justice Gorsuch, argued, among other things, that while
Gingles is the appropriate precedent to apply in a Section 2 claim of vote dilution, the first precondition
(i.e., that the challenger must produce an additional illustrative majority-minority district that is
reasonably configured) applied by the Court in Milligan was erroneous. In the view of Justice Alito, a
successful claim of vote dilution under Section 2 must demonstrate that a majority-minority district can
be established without race as the predominant factor in its creation and that, in this case, “there is strong
evidence that race played a predominant role in the production of the plaintiff’s illustrative maps.”
Subsequent Litigation
On September 5, 2023, a three-judge federal district panel preliminarily enjoined a revised congressional
redistricting map submitted by the State of Alabama. The district court determined that the revised map,
which does not contain a “a second district in which Black voters have an opportunity to elect a candidate
of their choice,” likely violates the VRA. On September 7, the district court ordered a special master and
cartographer to submit three proposed redistricting maps by September 25. On September 11, Alabama
state officials sought a temporary stay of the district court ruling by the Supreme Court, and on September
26, the Court denied the stay.
The special master submitted the proposed redistricting maps on September 25, creating a second district
where Black voters comprise a majority of the voting population. A hearing on the proposed maps has
been tentatively scheduled for October 3.
Congressional Research Service
5
Implications and Considerations for Congress
The key takeaway from Allen v. Milligan is that Section 2, as interpreted by Gingles, “is an appropriate
method of promoting the purposes of the Fifteenth Amendment.” Beyond Alabama, pending Section 2
challenges to redistricting maps—including congressional, state legislative, and local maps across the
country—will most likely move forward in accordance with the Milligan decision. For example, litigation
in Ardoin v. Robinson, involving a Section 2 challenge to Louisiana’s congressional redistricting map,
resumed after the Supreme Court in June 2022 had held the case in abeyance until Milligan was decided.
On June 26, 2023, the Supreme Court dismissed Ardoin and vacated the stay it had issued in 2022 so that
the U.S. Court of Appeals for the Fifth Circuit can consider the case in the ordinary course prior to the
2024 Louisiana congressional elections. Furthermore, as a long-term consequence, future Section 2
challenges to redistricting maps under Milligan may be brought.
Should Congress consider legislation to amend the VRA, the Court’s decision in Milligan might increase
the likelihood of a court upholding the constitutionality of a legislative remedy to a redistricting map that
has a racially discriminatory effect. For example, in rejecting the State of Alabama’s argument that
Section 2, as construed by Gingles, exceeds Congress’s authority under the Fifteenth Amendment, the
Court stated,
[F]or the last four decades, this Court and the lower federal courts have repeatedly applied the effects
test of §2 as interpreted in Gingles and, under certain circumstances, have authorized race-based
redistricting as a remedy for state districting maps that violate §2.
Still, Milligan may not be the final word from the Supreme Court on this issue. For example, as
discussed, Justice Kavanaugh referenced an argument that “the authority to conduct race-based
redistricting cannot extend indefinitely,” although he declined to consider that argument in this case.
Therefore, future Court rulings may add clarity to Congress’s authority to fashion such legislative
remedies for redistricting maps under Section 2.
Looking ahead, cases that involve issues related to those in Milligan are percolating in the federal courts.
As discussed in CRS product, Recent Developments in the Rights of Private Individuals to Enforce
Section 2 of the Voting Rights Act, a case is pending in the U.S. Court of Appeals for the Eighth Circuit
regarding who can sue to enforce Section 2 of the VRA. That case could ultimately be considered by the
Supreme Court. In addition, the Supreme Court has agreed to hear another redistricting dispute,
Alexander v. South Carolina State Conference of the NAACP, during its October 2023 Term.
Author Information
L. Paige Whitaker
Legislative Attorney
Disclaimer
Congressional Research Service
6
This document was prepared by the Congressional Research Service (CRS). CRS serves as nonpartisan shared staff
to congressional committees and Members of Congress. It operates solely at the behest of and under the direction of
Congress. Information in a CRS Report should not be relied upon for purposes other than public understanding of
information that has been provided by CRS to Members of Congress in connection with CRS’s institutional role.
CRS Reports, as a work of the United States Government, are not subject to copyright protection in the United
States. Any CRS Report may be reproduced and distributed in its entirety without permission from CRS. However,
as a CRS Report may include copyrighted images or material from a third party, you may need to obtain the
permission of the copyright holder if you wish to copy or otherwise use copyrighted material.
LSB11002 · VERSION 2 · UPDATED