 
 
 
 Legal Sidebari  
Capitol Unrest, Legislative Response, and the 
Bill of Attainder Clause 
January 22, 2021 
On January 6, 2021, a crowd gathered on the U.S. Capitol grounds, breached police barriers, entered and 
occupied portions of the Capitol building, a
nd clashed with law enforcement. The incident resulted in at 
least
 five deaths, dozens of injuries, and damage to federal property. Members of Congress and the Vice 
President, who were counting electoral votes for the 2020 presidential election, wer
e forced to evacuate in 
response to the unrest. Following the incident, so
me Members of Congress a
nd other commentators have 
cal ed for accountability for the individuals directly involved in the incident, as wel  as for others, 
potential y including  elected officials, who may ha
ve incited or supported the unrest.  
Many of those cal s for accountability raise complex legal issues. As a recent CR
S Legal Sidebar 
explains, the incident may implicate numerous provisions of existing criminal law. In addition, on January 
13, 2021, the House of Representative
s impeached President Donald Trump for incitement of insurrection 
based on the events of January 6. Lawmakers and commentators have also explored imposing liability 
under other legal authorities, including by passi
ng new legislation or seeking t
o bar certain individuals 
from holding office unde
r Section 3 of the Fourteenth Amendment.  
This Legal Sidebar addresses one of the more novel issues that these proposals may raise. Th
e Bil  of 
Attainder Clause prohibits Congress from enacting legislation that inflicts punishment on an individual 
basis without a judicial  trial. This Sidebar provides an overview of the Bil   of Attainder Clause and 
presents certain related legal considerations for Congress as the legislature responds to the Capitol unrest. 
The Bill of Attainder Clause 
Article I, Section 9, of the Constitution provides that Congress shal  pass “No Bil  of Attainder or ex post 
facto Law.
” Article I, Section 10, likewise prohibits the states from enacting bil s of attainder. (Thus, 
there are two Bil   of Attainder Clauses; this Sidebar uses the singular “Bil   of Attainder Clause” to refer to 
the clause that binds Congress.) The Supreme Court ha
s described a bil  of attainder as “a law that 
legislatively  determines guilt and inflicts punishment upon an identifiable  individual  without provision of 
the protections of a judicial trial.” Bil s  of attainder wer
e common in England before the
 Founding, 
primarily targeting individuals accused of disloyalty to the government. Bil s of attainder were also used 
in t
he American colonies. However, the Framers of the U.S. Constitution chose to depart from that 
historical practice. The Supreme Court ha
s explained that the constitutional prohibitions on bil s of 
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Congressional Research Service 
2 
attainder “reflect[] the Framers’ belief that the Legislative Branch is not so wel  suited as political y 
independent judges and juries to the task of ruling upon the blameworthiness of, and levying appropriate 
punishment upon, specific persons.” 
Individuals who believe they are subject to a bil   of attainder may chal enge the relevant legislation  in 
court. If a court finds that the legislation is a bil   of attainder, it ca
n declare the law unconstitutional. 
Judicial decisions invalidating  laws as bil s of attainder are relatively  rare, but key cases dating back to 
t
he Reconstruction Era provide a framework for evaluating bil  of attainder claims. The Supreme Court 
outlined the current test for bil  of attainder claims in the 1977 cas
e Nixon v. Administrator of General 
Services. In that case, the Cour
t held that legislation constitutes a bil  of attainder if it both (1) applies 
with specificity and (2) imposes punishment without trial. The following sections discuss each of those 
elements in turn. 
Specificity 
A law that singles out one or more individuals by name satisfies the specificity requirement. For instance, 
i
n United States v. Lovett, the Supreme Court struck down as a bil  of attainder “an Act specifical y 
cutting off the pay of certain named individuals  [federal employees] found guilty of disloyalty.” Likewise, 
a provision of the legislation  at issue in 
Nixon applie
d  only to former President Richard M. Nixon. Known 
as the Presidential Recordings and Materials Preservation Act, that statute directed the Administrator of 
General Services to take custody of Nixon’s presidential papers and tape recordings and promulgate 
regulations to govern the processing and preservation of those materials. The Supreme Court 
acknowledged “the Act’s specificity—the fact that it refer[red] to [Nixon] by name.” 
Legislation that does not identify a targeted individual by name may satisfy the specificity requirement as 
wel . I
n Foretich v. United States, the U.S. Court of Appeals for the D.C. Circuit considered a federal 
statute that responded to a high-profile child custody dispute by limiting the visitation rights of a father 
accused of sexual y abusing his daughter. The D.C. Circuit ruled that the legislati
on  applied with 
specificity because, “[a]lthough Congress stopped short of including the names” of the parents or child 
“in the text of the statute, the applicability  of the Act depend[ed] on such a narrow set of circumstances 
that it applie[d] to no known cases other than” the custody dispute that prompted the legislation. 
A law may also apply with specificity if it targets members of an identifiable group. For example, in the 
Reconstruction-era cas
e Cummings v. Missouri, the Supreme Court struck down as a bil  of attainder a 
provision of the Missouri state constitution that effectively barred former Confederate sympathizers from 
engaging in certain vocations. Likewise, in the 1965 cas
e United States v. Brown, the Court held that a 
statute making it a crime for any member of the Communist Party to serve as an officer of a labor union 
was a bil  of attainder. 
Legislation that targets a specific corporation may also satisfy the specificity requirement. While the 
Supreme Court has not decided whether the Bil  of Attainder Clause protects entities such as corporations, 
several lower federal courts have eithe
r held or
 assumed tha
t it does. 
Punishment 
Specificity standing alone is never sufficient to support a finding that a law is a bil   of attainder. The 
Nixon Court
 rejected the proposition that an individual  or defined group is subject to a bil  of attainder 
“whenever he or it is compel ed to bear burdens which the individual or group dislikes.” Congress is not 
limited to “the choice of legislating for the universe, or legislating only benefits, or not legislating at al .” 
Instead, the 
Nixon Cour
t explained, Congress may in some circumstances create “a legitimate class of 
one.” Thus, if a law applies with specificity but does not impose punishment, it wil  not be struck down as 
a bil  of attainder. 
  
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The test for whether a law imposes punishment is complex a
nd fact-based. In 
Nixon, the Supreme Court 
laid out
 three tests for assessing whether a law imposes punishment: (1) historical, (2) functional, and 
(3) motivational. Federal appeals courts have stated tha
t none of the three tests is decisive, a
nd not al  
three tests need to be satisfied for a law to be punitive. 
The Historical  Test 
T
he first authority courts consult in considering whether a law imposes punishment is “[t]he infamous 
history of bil s of attainder.” This historical test for punishment deems a statute to be punitive if it is one 
of a limited  set of legislative actions that were found to be bil s of attainder from before the Founding 
through the mid-20th centur
y. At English common law, a bil  of attainder was legislation imposing the 
death penalty without a judicial  trial. That definition later expanded to include 
“bil s of pains and 
penalties” that imposed other forms of criminal punishment such as banishment, imprisonment, or 
confiscation of property without trial. American courts further expanded the historical definition of 
punishment to include employment bans that prevent specific individuals or members of discrete classes 
from holding certain types of jobs. The vocational restrictions for Confederate sympathizers at issue in 
Cummings, the criminal prohibition of Communists serving as union officers i
n Brown, and the legislation 
that prevented named individuals accused of being “subversives” from drawing a federal salary i
n Lovett 
are al  examples of employment bans that are considered “punishment” under the historical test. 
However, courts have general y declined to extend historic jurisprudence related to employment bans to 
include restrictions on corporations. As an example, i
n Kaspersky Lab, Inc. v. Department of Homeland 
Security, Russia-based cybersecurity company Kaspersky Lab brought a bil  of attainder chal enge to a 
provision of the National Defense Authorization Act for Fiscal Year 2017 that barred the U.S. government 
from using any Kaspersky Lab products or services. The D.C. Circuit rejected the chal enge
, holding that 
none of the three tests for punishment was satisfied. With respect to the historical test, the court rejected 
the company’s argument that the ban on federal contracting with Kaspersky Lab was analogous to prior 
cases involving individual  employment bans. The cour
t explained that “although we assume that the Bil  
of Attainder Clause protects corporations as wel  as
 natural persons, we have no basis for likewise 
assuming that corporate entities feel burdens in the same way as living, breathing human beings.” In 
ACORN v. United States, the Second Circuit similarl
y held that withholding federal appropriations from a 
named company “does not constitute a traditional form of punishment,” noting, “There may wel  be 
actions that would be considered punitive if taken against an individual,  but not if taken against a 
corporation.”  
The Functional  Test 
The functional test is general y t
he most important of the three tests for punishment. This tes
t considers “whether the law under chal enge, viewed in terms of the type and severity of burdens imposed, 
reasonably can be said to further nonpunitive legislative  purposes.” The functional tes
t serves to prevent 
formalistic evasion of the Bil   of Attainder Clause, recognizing that there may be measures that were not 
historical y recognized as punishments that are nonetheless impermissibly punitive. But at the same time, 
the U.S. Court of Appeals for the Fifth Circuit ha
s stated that even some laws imposing penalties that 
were historical y considered punishments may not violate the Bil   of Attainder Clause if the “legislation 
has a legitimately  nonpunitive function, purpose, and structure.” 
The functional test is fact-specific. It first considers whether the statute has a non-punitive purpose. 
Courts apply a
 level of scrutiny somewhat more stringent than the most deferentia
l rational basis review, 
requiring what the D.C. Circuit ha
s cal ed “not some conceivable nonpunitive purpose, but rather an 
actual nonpunitive purpose.” If such a purpose exists and the chal enged law reasonably serves that 
purpose, courts general y find that the law is not punitive. For instance, in 
Nixon, the Supreme Cour
t held 
that the Presidential Recordings and Materials Preservation Act did not function as punishment because it 
  
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served the nonpunitive purposes of retaining materials relevant to the prosecution of the Watergate break-
in and preserving records with historical significance. In 
Kaspersky, the D.C. Circui
t held that a statute 
prohibiting the U.S. government from using products or services from Kaspersky Lab served a 
nonpunitive interest in promoting “the security of the federal government’s information systems.” In 
SBC 
Communications, Inc. v. Federal Communications Commission, the Fifth Circui
t held that a statute 
barring specific telecommunications companies from engaging in certain business activities served the 
nonpunitive purpose of “attempting to ensure fair competition in the [telecommunications] markets.” 
If a nonpunitive purpose is evident, the court considers whether the chal enged legislation is
 over- or 
underinclusive in view of its aims and whethe
r less burdensome alternatives could have accomplished the 
same goals. “
A grave imbalance or disproportion between the burden and the purported nonpunitive 
purpose suggests punitiveness, even where the statute bears some minimal relation to nonpunitive ends.” 
Thus, in 
Foretich, the D.C. Circui
t held that a statute altering the visitation rights of a father accused of 
sexual y abusing his child constituted a bil  of attainder, in part because of the imbalance between the 
burden the statute imposed and the statute’s “implausible nonpunitive purposes.” And in 
Consolidated 
Edison Co. v. Pataki, the Second Circui
t concluded that legislation barring a company from recovering 
certain costs from customers, on the stated basis that the company had “failed to exercise reasonable care” 
in its business, functioned as punishment because the court could “discern no wholly non-punitive 
purpose to justify” the law. 
The Motivational  Test 
T
he third and final test for punishment considers whether the legislature that enacted a chal enged law 
was motivated by an intent to punish the targeted person(s). Courts applying this test examine the bil ’s 
text and legislative  history to determine whether lawmakers expressed punitive intent.  
The motivational test is not usual y dispositive. The 
Nixon Court
 opined that a law may qualify as a bil   of 
attainder even without a “formal legislative  announcement of moral blameworthiness or punishment.” 
Moreover, if the historical and functional tests are not satisfied, the motivational test standing alone does 
not compel a finding that a law is punitive unless the reviewing court finds 
“unmistakable evidence of 
punitive intent.” However, a significant amount of punitive language in congressional documents or 
legislative  debate may support a finding that a law imposes punishment. For instance, committee reports 
on the legislation  at issue in 
Lovett characterized the affected individuals as “guilty of having engaged in 
‘subversive activity’” and “unfit” for government service. In 
Foretich, the D.C. Circui
t cited statements of 
multiple legislators characterizing the child at the center of the custody dispute as a “victim” and the 
legislation  as “deal[ing] with the inadequacies of the court system” and “bringing justice” to her family. 
By contrast, isolated statements by a few lawmakers general y do not suffice to show a legislative intent 
to punish. In 
Kaspersky, the D.C. Circui
t considered one Senator’s statements that the “case against 
Kaspersky Lab [wa]s overwhelming” and that “strong ties between Kaspersky Lab and the Kremlin 
[we]re alarming and wel -documented.” The court concluded that “even if [the Senator’s] statements did 
reveal a personal desire to punish Kaspersky, the company cite[d] no corroborating evidence indicating 
that other members of Congress shared her supposedly punitive motivations.” In 
ACORN, an organization 
that had been excluded from receiving federal funding cited statements of “nearly ten members of the 
House of Representatives” labeling the organization as corrupt and accusing it of specific offenses. The 
Second Circui
t concluded, “Despite the evidence of punitive intent on the part of some members of 
Congress, unlike in 
Lovett, there is no congressional 
finding of guilt in this case.” The court thus held that 
the statements were “insufficient to establish—by themselves—the clearest proof of punitive intent 
necessary for a bil  of attainder.” 
  
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Considerations for Congress 
Some proposed legislative  responses to the January 6, 2021, unrest at the Capitol may raise questions 
under the Bil   of Attainder Clause (among othe
r legal authorities that may apply when Congress enacts 
legislation  imposing new legal consequences for past events). The principles and case law discussed 
above suggest some ways that Congress could avoid bil  of attainder issues in addressing those events.  
The Bil   of Attainder Clause applies only to punishments imposed without a judicial trial, so prosecuting 
individuals  involved in the unrest at the Capitol under existing laws would not raise bil  of attainder 
concerns. (However, amending criminal laws to criminalize past conduct or increase criminal penalties 
for existing offenses might implicate the related constitutional prohibition 
on ex post facto laws. Thus, 
while the incident at the Capitol has prompted some cal s f
or new domestic terrorism laws, any new penal 
laws could apply only on a prospective basis.) 
By contrast, if Congress enacted legislation specifical y identifying one or mor
e individuals or groups 
al egedly  involved in the unrest at the Capitol a
nd imposing legal consequences on them, those people 
might chal enge such laws as bil s of attainder. Congress could seek to mitigate any bil   of attainder 
concerns by ensuring that proposed legislation does not fit within the historical categories of punishment 
subject to the Bil   of Attainder Clause, that it reasonably serves a nonpunitive purpose, and that the 
statutory text and legislative history do not reflect an intent to punish. As with any bil   of attainder 
litigation,  however, the outcome of such a chal enge would depend on the specific facts of the case. 
Congress might also address the unrest at the Capitol through enforcement 
of Section 3 of the Fourteenth 
Amendment against current or potential government officeholders. Section 3 applies to any person who 
having previously taken an oath, as a member of Congress, or as an officer of the United States, or 
as a member of any State legislature, or as an executive or judicial officer of any State, to support 
the Constitution of the United States, shall have engaged in insurrection or rebellion against the 
same, or given aid or comfort to the enemies thereof. 
The Fourteenth Amendment bars such persons from holding certain government offices unless two-thirds 
of each chamber of Congress votes to remove the bar. Congress might seek to enforce the bar through 
legislation, or a house of Congress might refuse to seat or expel certain Members based on the provision. 
Section 3 has not been used i
n over a century, and invoking the provision could raise numerous novel 
legal questions. One such question is whether legislation enforcing Section 3 could violate the Bil   of 
Attainder Clause. As the amendment was ratified following the Civil War to prevent former Confederate 
sympathizers from holding government office, some argue that Section 
3 carves out an implicit exception 
to the Bil   of Attainder Clause. Other
s counter that the Fourteenth Amendment “seek[s] to confirm and 
improve, rather than to weaken and impair the general spirit of the [C]onstitution,” and thus congressional 
enforcement of Section 3 “should respect the Constitution’s existing procedural guarantees against 
targeted legislative punishment.” To avoid bil   of attainder concerns in enforcing Section 3, Congress 
might provide a judicial trial  for al eged violations of the provision. That approach would be consistent 
with the Reconstruction-er
a Enforcement Act of 1870 and a current (bu
t seldom used) criminal statute, 
Title 18, Section 2383, of the United States Code. 
In addition, Congress has addressed the events at the Capitol through the impeachment process. The 
House of Representative
s impeached President Trump on January 13, 2021, f
or incitement of 
insurrection, al eging that he provoked the incident at the Capitol by making false claims about the 2020 
presidential election. The Senate did not conduct a trial on the impeachment before the end of President 
Trump’s term. One scholar has specifical 
y suggested that impeaching or removing a president who has 
left office could raise bil  of attainder issues. 
A recent Legal Sidebar discusses issues related to the timing 
of impeachment in more detail. 
  
Congressional Research Service 
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Author Information 
 Joanna R. Lampe 
   
Legislative Attorney  
 
 
 
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