Article I, Section 6, Clause 1 — Pay, Privileges, and Immunities

ArtI.S6.C1.1 Compensation of Members of Congress

The Compensation Clause of Article I, Section 6, Clause 1 provides for the national government to compensate Members of Congress for their services in amounts set by congressional legislation. With the ratification of the Twenty-Seventh Amendment on May 7, 1992,¹ congressional legislation “varying”—decreasing or increasing—the level of Members’ compensation may not take effect until an intervening election has occurred.

The Framers’ decision that Members of Congress should be paid from the Treasury of the United States reflected their view that Members of Congress worked for the nation as a whole and should be compensated accordingly. In his Commentaries on the Constitution of the United States, Justice Joseph Story reasoned, “If it be proper to allow a compensation for services to the members of congress, there seems the utmost propriety in its being paid out of the public treasury of the United States. The labor is for the benefit of the nation, and it should properly be remunerated by the nation.”² Conversely, if states or constituents compensated their specific Members of Congress, the Members might be more loyal to those interests than to the good of the nation as a whole. Justice Story observed: “[I]f the compensation were to be allowed by the states, or by the constituents of the members, if left to their discretion, it might keep the latter in a state of slavish dependence, and might introduce great inequalities in the allowance.”³ Concern that state frugality in compensating Members of Congress would reduce the pool of candidates to serve in Congress also drove the Framers’ decision to have the Federal Government compensate Members of Congress. As George Mason of Virginia commented during the Constitutional Convention: “[T]he parsimony of the States might reduce the provision so low that . . . the question would be not who were most fit to be chosen, but who were most willing to serve.”⁴

From the Founding to 1967, Congress passed legislation setting its rates of pay. In 1967, Congress passed a law that created a quadrennial commission to propose to the President salary levels for top officials of the Government, including Members of Congress.⁵ In 1975, Congress legislated to bring Members of Congress within a separate commission system authorizing the President to recommend annual increases for civil servants to maintain pay comparability with private-sector employees.⁶ Dissenting Members of Congress attacked the use of commissions to set congressional compensation as violating the Compensation Clause mandate that compensation be “ascertained by Law.” Courts, however, rejected these challenges.⁷ In the Ethics Reform Act of 1989,⁸ Congress provided for a formula to make adjustments to its compensation on an annual basis. Congress, however, has declined to accept the annual adjustment more often than it has accepted the adjustment.⁹ Following ratification of the Twenty-Seventh Amendment in 1992, which made pay increases effective only after an intervening election, a federal court of appeals panel ruled that Congress’s cost-of-living mechanism did not violate the Twenty-Seventh Amendment, and that a challenge to the quadrennial pay raise provision was not ripe.¹⁰

ArtI.S6.C1.2 Privilege from Arrest

In Article I, Section 6, Clause 1, the Framers provided for Members of Congress to be free from arrest when attending or traveling to and from Congress except in cases of treason, felony, or breaches of the peace.¹ In interpreting this provision, the Supreme Court has held that the phrase “treason, felony, and breach of the peace” encompasses all criminal offenses.² Consequently, Members are only privileged from arrests arising from civil suits, which were common in America at the time the Constitution was ratified.³

In providing for Members to “be privileged from Arrest during their Attendance at the Session of their respective Houses, and in going to and returning from the same,”⁴ the Framers followed English parliamentary and colonial practices as well as precedent established by the Articles of Confederation. The Articles provided that “the members of Congress shall be protected in their persons from arrests and imprisonments, during the time of their going to and from, and attendance on, Congress, except for treason, felony or breach of the peace.”⁵ In his Commentaries on the Constitution of the United States, Justice Joseph Story discussed the practice of privileging members of Parliament and colonial legislatures from arrest,⁶ reasoning that privilege from arrest reflected the “superior duties” of members of legislative bodies to the legislative process and the representation of their constituents.⁷ Justice Story stated:

When a representative is withdrawn from his seat by a summons, the people whom he

represents, lose their voice in debate and vote, as they do in his voluntary absence.

When a senator is withdrawn by summons, his state loses half its voice in debate and

vote, as it does in his voluntary absence. The enormous disparity of the evil admits of

no comparison. The privilege, indeed, is deemed not merely the privilege of the

member, or his constituents, but the privilege of the house also.⁸

Whether the provision in Article I, Section 6, excluding “Treason, Felony, and Breach of the Peace” offenses from the privilege from arrest applied to all criminal offenses or only criminal offenses involving violence and public disturbance has been subject to debate. After examining the historical meaning of the provision, the Supreme Court in Williamson v. United States, concluded that the qualifying language encompassed all criminal offenses. The Williamson Court adopted the government’s position, which was summarized by the Court as follows:

[T]he words “breach of the peace” should not be narrowly construed, but should be held

to embrace substantially all crimes, and therefore as in effect confining the

parliamentary privilege exclusively to arrests in civil cases. And this is based not

merely upon the ordinary acceptation of the meaning of the words, but upon the

contention that the words “treason, felony, and breach of the peace,” as applied to

parliamentary privilege, were commonly used in England prior to the Revolution, and

were there well understood as excluding from the parliamentary privilege all arrests

and prosecutions for criminal offenses; in other words, as confining the privilege alone

to arrests in civil cases, the deduction being that when the framers of the Constitution

adopted the phrase in question they necessarily must be held to have intended that it

should receive its well-understood and accepted meaning.⁹

Consequently, under Supreme Court precedent, the privilege from arrest applies only to civil cases.¹⁰ As one commentator has noted: “In practice, since the abolition of imprisonment for debt, this particular clause has lost most of its importance.”¹¹

While the privilege prevents Members from being arrested in civil suits, it does not prevent them from being served with subpoenas. In United States v. Cooper, Thomas Cooper, a newspaper publisher, was indicted under the Sedition Act of 1798 for libeling President John Adams. Cooper sought to compel several members of Congress to testify as witnesses at his trial. In allowing Cooper to subpoena Members of Congress, Justice Samuel Chase, in a Circuit Court decision, stated: “I do not know of any privilege to exempt members of congress from the service, or the obligations of a subpoena . . . .”¹² Over a hundred years later, Justice Louis Brandeis reached a similar conclusion in Long v. Ansell, holding that the privilege from arrest was limited to arrests in civil cases and did not encompass service of process. Writing for the Court, Justice Brandeis stated: “History confirms the conclusion that the immunity is limited to arrest.”¹³

ArtI.S6.C1.3.1 Overview of Speech or Debate Clause

The Supreme Court has described the Speech or Debate Clause as a provision that cannot be interpreted literally,¹ but instead must be construed “broadly” in order to effectuate the Clause’s vital role in the constitutional separation of powers.² “Deceptively simple”³ phrases—such as “shall not be questioned,” “Speech or Debate,” and even “Senators and Representatives”—have therefore been accorded meanings that extend well beyond their literal constructions.⁴ Arguably, this purpose-driven interpretive approach has given rise to some ambiguity in the precise scope of the protections afforded by the Clause. Despite uncertainty at the margins, it is well established that the Clause serves to secure the independence of the federal legislature by providing Members of Congress and their aides with immunity from criminal prosecutions or civil suits that stem from acts taken within the legislative sphere.⁵ As succinctly described by the Court, the Clause’s immunity from liability applies “even though their conduct, if performed in other than legislative contexts, would in itself be unconstitutional or otherwise contrary to criminal or civil statutes.”⁶ This general immunity principle forms the core of the protections afforded by the Clause.

Once it is determined that the Clause applies to a given action, the resulting protections from liability are “absolute,”⁷ and the action “may not be made the basis for a civil or criminal judgment against a Member.”⁸ In such a situation, the Clause acts as a jurisdictional bar to the legal claim.⁹ But this immunity is also complemented by two component privileges (an evidentiary privilege and a testimonial privilege) that emanate from the Clause and can be asserted to prevent certain compelled disclosures. Even if absolute immunity is inappropriate, the evidentiary component of the Clause prohibits the introduction of evidence of legislative acts for use against a Member,¹⁰ while the testimonial privilege protects Members from compelled testimony on protected acts.¹¹ The Supreme Court has not explicitly framed the protections of the Clause by reference to these two independent component privileges, but has instead implicitly recognized their existence.¹² As a result, these privileges are neither clearly established nor described, and may further contribute to the unsettled aspects of the Clause.

ArtI.S6.C1.3.2 Historical Background on Speech or Debate Clause

The text and purpose of the Speech or Debate Clause can be traced to Parliament’s historic struggles for supremacy with the English monarch.¹ Prior to 1689, the English Crown had repeatedly used both the power of prosecution, and its control over the courts, to punish, suppress, or intimidate Members of Parliament who had made statements critical of the Crown during parliamentary debates.² The common law of seditious libel “was interpreted with the utmost harshness against those whose political or religious tenets were distasteful to the government,” and used to imprison “disfavored” Members of the House of Commons.³ Following the Glorious Revolution and the new ascension of parliamentary power, the English Bill of Rights of 1689 sought to combat these past abuses by ensuring parliamentary independence through the establishment of a legislative privilege. That seminal document provided that “the Freedom of Speech, and Debates or Proceedings in Parliament, ought not to be impeached or questioned in any Court or Place out of Parliament.”⁴

Although English history and practice is essential to a complete understanding of the Clause, the Court has noted that the Clause must nevertheless be “interpreted in light of the American experience, and in the context of the American constitutional scheme of government . . . .”⁵ The early American “experience” began with colonial charters and early state constitutions, many of which included some form of legislative privilege that generally tracked the language of the English Bill of Rights.⁶ Following the American Revolution, the Articles of Confederation adopted language explicitly enshrining legislative privilege into the Federal Government structure, providing that “[f]reedom of speech and debate in Congress shall not be impeached or questioned in any court, or place out of Congress. . . .”⁷

The current text, which draws its key terms “[s]peech,” “[d]ebate,” and “questioned” directly from the English Bill of Rights, was adopted at the Constitutional Convention without significant discussion or debate.⁸ In light of the absence of any contrary intent, and despite the fact that early American history did not “reflect” the same “catalogue of abuses at the hands of the Executive that gave rise to the privilege in England,”⁹ it may nonetheless be “reasonably inferred that the framers of the Constitution meant” to incorporate the principles underlying the legislative privilege established in England through the English Bill of Rights “by the use of language borrowed from that source.”¹⁰ James Wilson, one of the few Members of the Constitutional Convention to comment on the Clause, called the provision “indispensably necessary” to the “discharge” of the “publick [sic] trust.”¹¹ His view was that Members of Congress must be clothed with the “fullest liberty of speech” so as to “be protected from the resentment of every one, however powerful, to whom the exercise of that liberty may occasion offense.”¹² The Clause, therefore, appears to have been adopted for the same basic purpose that undergirded its English and early American ancestors: to preserve the independence and integrity of individual Members of the legislative body by “prevent[ing] intimidation by the executive and accountability before a possibly hostile judiciary.”¹³ As such, it represents a key pillar of the American separation of powers.

Preventing such intimidation is not “the sole function of the Clause.”¹⁴ The Clause also serves a good governance role, effectively barring judicial or executive processes that may “disrupt” or “distract[ ]” from a Member’s representative or legislative obligations.¹⁵ Consistent with this anti-distraction rationale, the Clause’s broad proscription that Members not be “questioned in any other place” has been interpreted as limiting not only actions initiated by the Executive Branch—which clearly implicate the separation of powers—but also private civil suits initiated by members of the public—which generally implicate the separation of powers only to a lesser degree.¹⁶

ArtI.S6.C1.3.3 Activities to Which Speech or Debate Clause Applies

A series of decisions from the Supreme Court address the general scope of the Speech or Debate Clause. These cases elucidate the distinction between legislative acts, such as voting or debating, which are accorded protection under the Clause and are not subject to “inquiry,”¹ and political or other nonlegislative acts, which are not protected by the Clause and therefore may serve as the basis for a legal action.² The cases suggest at least three noteworthy themes. First, despite the text, the protections afforded by the Clause extend well beyond “speeches” or “debates” undertaken by “Senators and Representatives.”³ Second, otherwise legitimate political interactions external to the legislative sphere—for example, disseminating information outside of Congress—are generally not considered protected legislative acts.⁴ Third, the Clause does not immunize criminal conduct that is clearly not part of the “due functioning” of the legislative process.⁵

The Supreme Court adopted a broad interpretation of “Speech or Debate” from its first assessment of the Clause in the 1881 case Kilbourn v. Thompson.⁶ In Kilbourn, the Court considered whether a civil action could be maintained against Members who were responsible for initiating and approving a contempt resolution ordering an arrest.⁷ The Members defended themselves on the ground that their acts were protected by the Clause. The Court agreed, determining that the Members were not subject to suit for their actions.⁸

The Court adopted a constitutional construction of the Clause that extended its protections beyond mere legislative deliberation and argument, holding that “it would be a narrow view of the constitutional provision to limit it to words spoken in debate.”⁹ Instead, the Court determined that the Clause applied to “things generally done in a session of the House by one of its members in relation to the business before it,” including the presentation of reports, the offering of resolutions, and the act of voting.¹⁰ Accordingly, the Court concluded that although the arrest itself may have been unlawful, the Members were immune from suit and could not be “brought in question” for their role in approving the resolution “in a court of justice or in any other place,” as that act was protected by the Clause.¹¹

The Court only rarely addressed the Clause after Kilbourn.¹² It was not until the 1966 case United States v. Johnson that the Court embarked on an attempt to define the protections afforded by the Clause in the context of a criminal prosecution of a Member.¹³ In Johnson, a former Member challenged his conviction for conspiracy to defraud the United States that arose from allegations he had agreed to give a speech defending certain banking interests in exchange for payment.¹⁴ In prosecuting the case, the government relied heavily on the former Member’s motive for giving the speech, introducing evidence that the speech had been made solely to serve private, rather than public, interests.¹⁵ Focusing on the admission of this protected evidence, the Court overturned the conviction. “However reprehensible such conduct may be,” the Court concluded that a criminal prosecution, the “essence” of which requires proof that “the Congressman’s conduct was improperly motivated,” was “precisely what the Speech or Debate Clause generally forecloses from executive and judicial inquiry.”¹⁶ The opinion noted that the Clause must be “read broadly to effectuate its purposes,” ultimately concluding that it prohibits a prosecution that is “dependent” upon the introduction of evidence of “the legislative acts” of a Member or “his motives for performing them.”¹⁷ Although it overturned the conviction, the Court remanded the case to the district court for further proceedings, holding that the government should not be precluded from bringing a prosecution “purged of elements offensive to the Speech or Debate clause” through the elimination of all references to the making of the speech.¹⁸

The Johnson case stands for at least two important propositions. First, the opinion demonstrated that the government is not prohibited from prosecuting conduct that merely relates to legislative duties, but is not itself a legislative act.¹⁹ When a legislative act is not an element of the offense, the government may proceed with its case by effectively “purg[ing]” the introduction of evidence offensive to the Clause.²⁰ Second, though not explicitly articulating such a privilege, the opinion impliedly introduced the evidentiary component of the Clause by holding that even though a case may go forward, a Member may invoke the Clause to bar admission of specific protected evidence.²¹

The evidentiary privilege component of the Clause was reaffirmed in United States v. Helstoski.²² There, the Court expressly held that any “references to past legislative acts of a Member cannot be admitted [into evidence] without undermining the values protected by the Clause.”²³ The Court acknowledged that “without doubt the exclusion of such evidence will make prosecutions more difficult,” but reasoned that such a limitation was consistent with a constitutional provision that was “designed to preclude prosecution of Members” entirely when legislative acts form the basis of the claim.²⁴

In the 1972 decision of United States v. Brewster, which involved a Member’s challenge to his indictment on a bribery charge, the Court reaffirmed Johnson and clarified that “a Member of Congress may be prosecuted under a criminal statute provided that the Government’s case does not rely on legislative acts or the motivation for legislative acts.”²⁵ The Court made clear that the Clause does not prohibit inquiry into illegal conduct simply because it is “related” to the legislative process or has a “nexus to legislative functions,” but rather, the Clause protects only the legislative acts themselves.²⁶ By adhering to such a limitation, the Court reasoned that the result would be a Clause that was “broad enough to insure the historic independence of the Legislative Branch, essential to our separation of powers, but narrow enough to guard against the excesses of those who would corrupt the process by corrupting its Members.”²⁷

Brewster also drew an important distinction between legislative and political acts. The opinion labeled a wide array of constituent services,²⁸ though “entirely legitimate,” as “political in nature” rather than legislative.²⁹ As a result, the Court suggested that “it has never been seriously contended that these political matters . . . have the protection afforded by the Speech or Debate Clause.”³⁰

Turning to the terms of the bribery indictment, the Court framed the fundamental threshold question for any prosecution of a Member of Congress as “whether it is necessary to inquire into how [the Member] spoke, how he debated, how he voted, or anything he did in the chamber or in committee in order to make out a violation of this statute.”³¹ With regard to bribery, the Court reasoned that because acceptance of the bribe is enough to prove a violation of the statute, there was no need for the government to present evidence that the Member had later voted in accordance with the illegal promise, “[f]or it is taking the bribe, not performance of the illicit compact, that is a criminal act.”³² Because “taking the bribe is, obviously, no part of the legislative function” and was therefore “not a legislative act,” the government would not be required to present any protected legislative evidence in order to “make out a prima facie case.”³³ In that sense, the Court distinguished the case before it from Johnson. Whereas the prosecution in Johnson relied heavily on showing the motive for Johnson’s floor speech, the prosecution in Brewster need not prove any legislative act, but only that money was accepted in return for a promise.

ArtI.S6.C1.3.4 Distraction Rationale and Speech or Debate Clause

Two cases from the late 1960s reveal the Court’s view that the Clause embodies a desire to prevent the “distractions” associated with compelling a Member to participate in a legal proceeding. In Dombrowski v. Eastland, the Court affirmed the dismissal of a civil action against a Senator for allegedly conspiring with Louisiana state officials to violate the petitioner’s Fourth Amendment rights.¹ In doing so, the Court noted broadly, and without additional discussion, that a Member “should be protected not only from the consequences of litigation’s results but also from the burden of defending themselves.”²

Similarly, in Powell v. McCormack, the Court suggested that “the purposes of the Speech or Debate Clause are fully protected if legislators are relieved of the burden of defending themselves.”³ The Court further described its underlying reasoning, noting that “[t]he purpose of the protection afforded legislators is not to forestall judicial review of legislative action but to insure that legislators are not distracted from or hindered in the performance of their legislative tasks by being called into court to defend their actions.”⁴ The Court’s brief and indefinite articulation of the anti-distraction rationale in these and subsequent cases has given rise to a significant debate among the lower courts regarding whether the principle justifies prohibitions on the disclosure of protected documents, even when not for evidentiary use.⁵

ArtI.S6.C1.3.5 Communications Outside the Legislative Process

The Supreme Court’s opinion in Gravel v. United States establishes that communications outside of the legislative process are generally not protected by the Clause.¹ Gravel involved a Speech or Debate challenge to a grand jury investigation into the disclosure of classified documents by a Senator and his aides.² After coming into possession of the “Pentagon Papers”—a classified Defense Department study addressing U.S. involvement in the Vietnam War—Senator Mike Gravel disclosed portions of the document at a subcommittee hearing and submitted the entire study into the record.³ The Senator and his staff had also allegedly arranged for the study to be published by a private publisher.⁴ A grand jury subsequently issued a subpoena for testimony from one of Senator Gravel’s aides and the private publisher.⁵ Senator Gravel intervened to quash the subpoenas.⁶

The Supreme Court rejected Senator Gravel’s effort to shield his aide and the publisher from testifying. The Gravel opinion began by reasoning that “[b]ecause the claim is that a Member’s aide shares the Member’s constitutional privilege, we consider first whether and to what extent Senator Gravel himself is exempt from process or inquiry by a grand jury investigating the commission of a crime.”⁷ In addressing the scope of the Senator’s protections, the Court implied the existence of the testimonial component of the Clause, noting that the protections of the Clause protect a Member from compelled questioning.⁸ The Court did so by stating, without further discussion, that it had “no doubt” that “Senator Gravel may not be made to answer—either in terms of questions or in terms of defending himself from prosecution—for the events that occurred at the subcommittee meeting.”⁹

The Gravel opinion also drew a clear line of demarcation between protected legislative acts and other unprotected acts not “essential to the deliberations” of Congress.¹⁰ Although the Senator was protected for his actions at the hearing, the Senator’s alleged arrangement for private publication of the Pentagon Papers was not “part and parcel of the legislative process” and was therefore not protected by the Clause.¹¹ In reaching this determination, the Court established a working definition of “legislative act” that remains applicable today, holding that a legislative act is an

integral part of the deliberative and communicative processes by which Members

participate in committee and House proceedings with respect to the consideration and

passage or rejection of proposed legislation or with respect to other matters which the

Constitution places within the jurisdiction of either House.¹²

Private publication, as opposed to publication in the record, was “in no way essential to the deliberations of the Senate.”¹³ Thus, the Clause provided no immunity from testifying before the grand jury relating to that arrangement.¹⁴

The Court reaffirmed its views on internal and external distribution of legislative materials in its subsequent decisions in Doe v. McMillan and Hutchinson v. Proxmire.¹⁵ McMillan involved a civil suit brought by parents and students in which it was alleged that the disclosure and publication of “somewhat derogatory” personal information in a congressional committee report on the District of Columbia public school system violated the petitioner’s right to privacy.¹⁶ The report was distributed within Congress and ordered printed and distributed by the Government Publishing Office (GPO).¹⁷ The complaint named a variety of defendants, including committee Members, congressional staff, the head of the GPO, and a number of non-congressional parties.¹⁸ The Court began by holding that the claims against the committee Members and their staffs for their activities, such as preparing and approving the report, were “plain[ly] . . . barred” by the Clause.¹⁹ However, the Court found that the public printer enjoyed no Speech or Debate Clause protections for the republication of the report to the public, even though that action was directed by Congress.²⁰ Public republication of an otherwise protected legislative report, the Court reasoned, was not “an essential part” of the legislative or deliberative process.²¹ In reaching that conclusion, the Court rejected claims that Congress’s public “informing function” should fall within the Clause’s protections.²²

Similarly, in Hutchinson, the Court held that the Clause did not provide a Senator and his aide with immunity in a defamation suit arising from the Senator’s public dissemination of his “Golden Fleece Award,” a prize intended to draw attention to wasteful government spending.²³ The suit alleged damages arising from the Senator publicizing the award nationwide through press releases and newsletters.²⁴ In holding that the Clause did not provide the Member and his aide with immunity, the Court saw no reason “for departing from the long-established rule” that a Member may face liability for republication of legislative statements or reports.²⁵ Whereas the Senator would be “wholly immune” for his efforts to publicize the award through a speech in the Senate, “neither the newsletters nor the press release was ‘essential to the deliberations of the Senate’” and therefore they were not protected.²⁶ The Court rejected arguments put forward by the Senator that public dissemination of the award came within the protections of the Clause either by advancing the “the duty of Members to tell the public about their activities,” an argument previously rejected in McMillan, or as a means to influence other Senators.²⁷ Neither activity, the Court concluded, was “part of the legislative function or the deliberations that make up the legislative process.”²⁸

ArtI.S6.C1.3.6 Subpoena Power and Congress

In Eastland v. U.S. Servicemen’s Fund, the Supreme Court concluded that the Clause acts as a significant barrier to judicial interference in Congress’s exercise of its subpoena power.¹ The case involved a suit filed by a private non-profit organization against the Chairman of a Senate subcommittee seeking the Court to enjoin a congressional subpoena issued to a bank for the non-profit’s account information.² The subpoena was issued as part of an investigation into alleged “subversive” activities harmful to the U.S. military conducted by the organization.³ The Court held that because the “power to investigate and to do so through compulsory process plainly” constitutes an “indispensable ingredient of lawmaking,” the Clause made the subpoena “immune from judicial interference.”⁴ Eastland is generally cited for the proposition that the Clause prohibits courts from entertaining pre-enforcement challenges to congressional subpoenas.⁵ As a result, the lawfulness of a subpoena usually may not be challenged until Congress seeks to enforce the subpoena through either a civil action or contempt of Congress.⁶

ArtI.S6.C1.3.7 Persons Who Can Claim the Speech or Debate Privilege

Although the text of the Speech or Debate Clause refers only to “Senators and Representatives,” and therefore clearly applies to actions by any Member of Congress,¹ it is now well established that protections of the Clause apply equally to certain congressional staff.² Initially, however, the Court seemed apprehensive about such an extension. For example, in early cases the Court held that while Members enjoyed immunity for their actions, the congressional staffers who were also named as defendants, and who were responsible for implementing the Member’s directives, did not.³ Indeed, in Dombrowski v. Eastland, the Court relied on language in Tenney v. Brandhove in reasoning that the protection of the Clause “‘deserves greater respect’” when a legislator is sued “‘than where an official acting on behalf of the legislature is sued.’”⁴

However, the Court later shifted course. In Gravel, the Court held that the Clause protects an aide’s action when the Clause would have protected the same action if it were done by a Member.⁵ An aide, the Court reasoned, should be viewed as the “alter ego” of the Member he or she serves.⁶ The Gravel Court recognized that the Member and his or her aide must be “treated as one,”⁷ noting:

[I]t is literally impossible, in view of the complexities of the modern legislative process,

with Congress almost constantly in session and matters of legislative concern

constantly proliferating, for Members of Congress to perform their legislative tasks

without the help of aides and assistants; that the day-to-day work of such aides is so

critical to the Members’ performance that they must be treated as the latter’s alter

egos; and that if they are not so recognized, the central role of the Speech or Debate

Clause—to prevent intimidation of legislators by the Executive and accountability

before a possibly hostile judiciary—will inevitably be diminished and frustrated.⁸

The opinion distinguished its earlier decisions on the ground that in those cases, the aides did not themselves engage in legislative acts.⁹ Whereas, in Gravel, and a number of subsequent cases, the Court was willing to extend the protections of the Clause so long as the act of the aide was itself a legislative act, and therefore would have been protected had it been performed by the Member.¹⁰

At issue in Gravel were the actions of a Member’s personal staff, but the Clause applies to others as well. Decisions of the Court have extended the protections of the Clause to committee staff, including those in the position of chief counsel, clerk, consultant, staff director, and investigator.¹¹

However, it should be noted that any protections under the Clause that are enjoyed by congressional or legislative staff flow from the Member.¹² They do not inhere personally to the individual. As a result, an “aide’s claim of privilege can be repudiated and thus waived by the [Member].”¹³ Moreover, the fact that a legislative aide is carrying out a directive from the Member, or even has specific authorization from the House or Senate to take the act in question, “is not sufficient to insulate the act from judicial scrutiny.”¹⁴ This principle was underscored in Kilbourn, in which the Court denied Speech or Debate Clause immunity for the Sergeant at Arms for carrying out an arrest pursuant to a House resolution,¹⁵ and Powell v. McCormack, in which the Court similarly held that a suit could be maintained against the House Sergeant at Arms, Doorkeeper, and Clerk for implementing the House’s exclusion of Representative Adam Clayton Powell.¹⁶