The Norms and Consequences of Investigating a Presidential Predecessor

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Donald Trump has explicitly promised a campaign of retribution against his predecessors and political rivals.

This targeting of political opponents has become a central theme of his political platform, with Citizens for Responsibility and Ethics (CREW) documenting dozens of threats to use government power against political enemies.

This raises a question of profound importance for the nation’s future: What happens when the immense power of the federal government, particularly the Department of Justice, is directed at a past administration?

The answer involves a complex interplay of political norms, constitutional law, and the very definition of justice in a polarized era.

This analysis explores the specific plans for these investigations, the historical and legal norms at stake, the new legal landscape created by the Supreme Court’s recent immunity ruling, and the potential consequences for American democracy.

In This Article

• Examines how investigating or prosecuting a former president challenges long-standing U.S. political norms.
• Describes how presidential immunity doctrines, especially after recent Supreme Court rulings, complicate accountability.
• Highlights historical precedent (e.g., Nixon pardon) and its influence on expectations about post-presidency prosecution.
• Reviews differing viewpoints: some argue investigations protect the rule of law, others warn they risk politicizing justice.
• Notes that many democracies have prosecuted former leaders, but outcomes depend on institutional strength and public trust.
• Warns that unchecked investigations or immunity could both damage democratic norms in different ways.

So What?

• How the U.S. handles investigations of ex-presidents will set lasting precedents for accountability, presidential power, and democratic stability.
• Poorly managed investigations risk politicizing the justice system; avoiding them entirely risks creating a “president above the law.”
• Clear legal standards and strong institutional safeguards are essential to maintain both rule of law and democratic trust.

The “Retribution” Agenda: Stated Intentions and Institutional Plans

The prospect of a second Trump administration investigating its predecessors isn’t speculation. It’s based on explicit statements, detailed policy proposals, and official executive actions.

Trump’s Specific Allegations and Calls for Investigation

Throughout his first term and in the years since, Donald Trump has consistently accused his political opponents of criminal behavior and called for their investigation and prosecution. These calls have targeted both the Obama and Biden administrations with specific, often unsubstantiated, allegations.

One of the earliest narratives was “Obamagate,” a baseless conspiracy theory alleging that the Obama administration illegally spied on the 2016 Trump campaign. Trump labeled this the “biggest political crime in American history” and repeatedly called for former President Obama to be indicted for treason.

These claims were ultimately refuted by his own Justice Department, which found no evidence of illegal wiretapping or improper “unmasking” of individuals like Michael Flynn.

More recently, the focus has shifted to the Biden administration. A central rationale for a potential investigation is the claim that President Biden’s “documented cognitive decline” rendered him unfit to govern, raising questions about who was truly exercising presidential authority.

A Presidential Memorandum signed by Trump directs a review into whether aides conspired to deceive the public and unconstitutionally wielded power in Biden’s name. This narrative heavily relies on the extensive use of an autopen—a mechanical signature device—to sign official documents, which Trump has called “illegal.”

While the use of autopens by presidents has been a recognized and legally accepted practice for decades, the investigation seeks to determine “who ran the autopen,” framing a routine administrative practice as a potential conspiracy.

Beyond these specific allegations, Trump has also called for the appointment of a special prosecutor to investigate the 2020 election, which he continues to falsely claim was rigged, despite numerous court rulings and findings by his own former Attorney General to the contrary.

The targeting has also been personal, with executive orders directing investigations into former officials-turned-critics like former FBI Director James Comey, former National Security Advisor John Bolton, New York Attorney General Letitia James, Miles Taylor, a former Homeland Security official, and Christopher Krebs, a former cybersecurity chief. This illustrates a pattern of using government power to pursue perceived enemies.

The Institutional Blueprint: Project 2025

The rhetoric of retribution is backed by a detailed institutional plan known as Project 2025. Authored by The Heritage Foundation in partnership with over 100 conservative organizations, this 920-page “Mandate for Leadership” serves as a comprehensive blueprint for a new conservative administration to fundamentally restructure the federal government.

The project is explicitly designed to “institutionalize Trumpism” and is built on a controversial interpretation of the “unitary executive theory,” which posits that the president has complete and total control over the entire executive branch.

A central target of Project 2025 is the Department of Justice. The plan proposes to erode the DOJ’s traditional independence by “reexamining” the post-Watergate norms that were established to limit political contact between the White House and the department on specific investigations and prosecutions.

This would allow a president to exert far more direct control over prosecutorial decisions. For example, the plan calls for reassigning the prosecution of election-related offenses from the DOJ’s Civil Rights Division to the Criminal Division, a move critics see as designed to facilitate politically motivated cases.

To ensure loyalty, Project 2025 advocates for a massive political purge of the federal workforce through the revival of “Schedule F,” a job classification that would convert tens of thousands of career civil servants into at-will political appointees who can be fired at will.

This would enable an incoming administration to remove experienced, non-partisan prosecutors, investigators, and other government experts and replace them with ideological loyalists chosen for their fealty to the president’s agenda. The project’s proponents openly embrace the Reagan-era maxim that “personnel is policy,” viewing the replacement of the civil service as the most critical element of their plan.

The blueprint calls for specific prosecutions. It explicitly suggests that the Pennsylvania Secretary of State should be prosecuted for issuing guidance that protected mail-in voting access during the COVID-19 pandemic. It also proposes using the DOJ to prosecute private employers who support Diversity, Equity, and Inclusion (DEIA) initiatives, demonstrating an intent to wield federal law enforcement power against ideological opponents in both the public and private sectors.

The Counter-Narrative: “Ending the Weaponization of Government”

The Trump administration and its allies frame these plans as a necessary corrective to what they describe as the “weaponization of the federal government” by their political opponents. This narrative provides the official justification for their agenda and is a key element in the current political discourse.

An executive order titled “Ending the Weaponization of the Federal Government” establishes a formal policy to “identify and take appropriate action to correct past misconduct” by the previous administration.

The specific grievances cited as evidence of this “weaponization” include a 2021 DOJ memo directing the FBI to address threats against school board members, the perceived failure of the Biden administration to prosecute individuals who vandalized crisis pregnancy centers, and the creation of a “Disinformation Governance Board” at the Department of Homeland Security.

The administration’s budget proposals also reflect this narrative, calling for the elimination of programs at the Cybersecurity and Infrastructure Security Agency (CISA) that countered disinformation and for defunding the Internal Revenue Service (IRS) to prevent the “targeted harassment of conservatives.”

This counter-narrative has led to the creation of a weaponization working group within the administration, tasked with reviewing the actions of officials who previously investigated Trump, and a “special project” to investigate the prosecutors involved in the January 6 insurrection cases.

This creates a situation where the term “weaponization” is used by both sides to describe the actions of the other. One side’s “accountability” is the other’s “retribution,” and one side’s effort to “end weaponization” is viewed by the other as the very blueprint for it.

This semantic conflict is a core feature of the current political moment, creating a cycle of justification where each side’s actions are framed as a necessary defense against the other’s politicization of the justice system. For the public, this dynamic makes it increasingly difficult to discern a neutral application of the law, which in turn erodes trust in the very institutions of justice.

The Unwritten Rule: Is Prosecuting a Former President Taboo?

A central argument against investigating a former president is that it violates a sacred, unwritten rule of American politics. However, a closer examination of U.S. history and legal principles reveals that this “norm” is more complex and contested than it first appears.

A Norm of Prudence, Not Prohibition

Legal analysts argue that there is no fundamental, rule-of-law norm that forbids the prosecution of a former president. The idea that such a norm exists is a misinterpretation of a more profound and genuinely vital principle: the prohibition against politicized prosecutions.

This is not a norm designed to protect a specific class of people (politicians) but to safeguard the integrity of the legal process itself.

This prohibition is derived from two of the most fundamental pillars of the U.S. Constitution. The first is the right to a fair trial, guaranteed by the Fifth and Sixth Amendments, which ensures that guilt or innocence is determined by an impartial process based on evidence, not political pressure.

The second is the right to equal protection under the law, enshrined in the Fourteenth Amendment, which mandates that the law be applied evenly to all citizens, regardless of their status or political affiliation.

A politicized prosecution is one where the decision to bring charges is driven by political animus or partisan advantage rather than a good-faith application of facts to the law. The key distinction is whether the outcome is decided in a courtroom through a judicial process or predetermined by a political process happening outside of it.

Therefore, the critical question is not whether a former president is being prosecuted, but why and how.

The Ghost of Watergate: The Nixon Pardon Revisited

The primary source for the modern belief in a norm against prosecuting ex-presidents is President Gerald Ford’s 1974 pardon of Richard Nixon. However, Ford’s own justification for the pardon reveals that his decision was based on political prudence and a desire for national healing, not on any perceived legal prohibition.

In his pardon proclamation, Ford expressed grave doubts that Nixon could receive a fair trial in the near future and feared that a protracted legal battle would “arouse ugly passions,” further polarize an already divided nation, and distract the country from pressing challenges.

His stated goal was to restore “tranquility” and allow the nation to move past the trauma of Watergate.

The pardon was immediately and intensely controversial. Ford’s approval rating plummeted from 71 percent to 50 percent, a drop that is widely seen as a major factor in his loss to Jimmy Carter in the 1976 presidential election.

Many Americans were outraged by the apparent inequality of the decision, as Nixon was granted a “full, free, and absolute pardon” while his top aides, such as H.R. Haldeman and John Ehrlichman, were prosecuted and ultimately imprisoned for their roles in the scandal.

Critics at the time worried it would set a dangerous precedent, leading future presidents to believe they could break the law with impunity.

Over time, public opinion on the pardon softened, and for many years it was viewed by some as a courageous act of statesmanship that put the country’s interests first. However, in recent years, the pardon has been reassessed in a much harsher light.

Many historians and legal scholars now argue that Ford’s decision, while well-intentioned, had a catastrophic long-term cost. It is seen as having created an “expectation of criminal impunity for both sitting and former presidents” that has “paralyzed a half-century of prosecutors.”

In this view, the very act intended to resolve a political crisis in 1974 inadvertently helped lay the groundwork for the constitutional crisis of the present day by establishing a powerful, albeit informal, precedent that presidents are above the law.

A Global Perspective on Prosecuting Leaders

The argument that prosecuting a former head of state is a hallmark of unstable “banana republics” is a powerful political talking point, but it is factually incorrect. In reality, holding former leaders criminally accountable is a relatively common practice in many of the world’s most mature and stable democracies.

According to a study by Freedom House, 43 percent of the world’s freest countries have seen their presidents or prime ministers criminally charged since the year 2000.

These cases demonstrate that a nation’s democratic institutions can survive such prosecutions and can sometimes be strengthened by them. While such trials are inevitably divisive and perceived as political by the leader’s supporters, they can also solidify the rule of law by sending a clear message that no one, no matter how powerful, is exempt from accountability.

This international context reframes the American debate. It shows that the crucial question is not whether a former president can be prosecuted, but whether the nation’s legal and political institutions are strong enough to ensure that such a prosecution is—and is perceived to be—a legitimate application of the law, rather than a political vendetta.

The Legal Battlefield: Immunity, Privilege, and Presidential Power

The question of whether and how a former president can be investigated is ultimately governed by law. A recent, landscape-altering Supreme Court decision on presidential immunity has fundamentally reshaped this legal battlefield, creating new protections for presidents while also raising profound questions about accountability.

Presidential Immunity Explained: Trump v. United States

In its landmark 2024 decision in Trump v. United States, the Supreme Court rejected the claim of absolute, total immunity from criminal prosecution for a former president. However, it established a new, complex, multi-tiered framework that grants presidents significant protection from criminal liability for actions taken while in office.

Tier 1: Absolute Immunity for “Core” Official Acts. The Court ruled that a president has absolute immunity from criminal prosecution for any acts that fall within their “core” constitutional powers under Article II. Crucially, the Court defined these core powers broadly to include the president’s authority to direct the Department of Justice.

This means a president cannot be criminally prosecuted for ordering the DOJ to open or close an investigation, even if the motive is corrupt or purely political.

Tier 2: Presumptive Immunity for “Outer Perimeter” Official Acts. For other actions that are considered “official” but are not part of the president’s core, exclusive powers, the Court granted presumptive immunity. This presumption can only be overcome if prosecutors can meet an exceptionally high standard: they must prove that prosecuting the former president for that specific act would pose “no danger of intrusion” on the authority and functions of the Executive Branch.

This creates a formidable barrier to prosecution for a wide range of presidential conduct.

Tier 3: No Immunity for Unofficial Acts. The Court affirmed that a former president has no immunity for purely private, unofficial acts committed while in office. However, it created a major evidentiary hurdle for such prosecutions by ruling that a president’s official acts cannot be used as evidence to prove the criminal intent behind their unofficial acts.

This could make it extremely difficult to prove motive in cases where official and unofficial conduct are intertwined.

Finally, the Court definitively rejected the argument that a president must first be impeached by the House and convicted by the Senate before they can face criminal charges after leaving office.

The Independence of the Justice Department

A cornerstone of the American rule of law for the past 50 years has been the norm of independence for the Department of Justice. Born from the ashes of the Watergate scandal and President Nixon’s “Saturday Night Massacre”—in which top DOJ officials resigned rather than carry out his order to fire the special prosecutor—this norm holds that the DOJ’s law enforcement decisions must be insulated from White House political influence.

This principle is based on the understanding that federal prosecutors represent the interests of the United States as a whole, not the personal or political interests of the sitting president.

This post-Watergate consensus is now under direct assault. As detailed in Project 2025, a new administration could formally “reexamine” and discard the policies that limit White House-DOJ contact on specific cases.

Combined with plans to staff the department with political loyalists, this would effectively transform the DOJ into an enforcement arm of the president’s political agenda.

This effort is further bolstered by a recent reinterpretation of executive power from the Office of Legal Counsel (OLC), which argues that any action taken by a sitting president is presumed to be lawful unless a specific statute explicitly forbids it. This doctrine, which is binding on the executive branch, effectively disables the DOJ from investigating a sitting president and recasts it as a shield for the president rather than a watchdog for the public.

This shift would have a profound impact on the concept of prosecutorial discretion. The executive branch has broad constitutional authority, under the President’s duty to “take Care that the Laws be faithfully executed,” to decide which laws to enforce and how to enforce them.

Traditionally, this discretion is guided by DOJ policies that prioritize cases based on factors like the strength of the evidence and whether a prosecution would serve a “substantial federal interest.” In a politicized DOJ, this discretion could be redirected to serve purely partisan ends, with decisions to prosecute or not prosecute based on political loyalty rather than legal merit.

A Spectrum of Legal and Ideological Opinion

The debate over presidential immunity and prosecution has exposed deep divisions among legal experts and civil society organizations, often falling along ideological lines.

The Heritage Foundation (For Broad Immunity): This influential conservative think tank argues that the Supreme Court’s immunity decision was a necessary and correct protection for the presidency. They contend that without such immunity, presidents would be paralyzed by the fear of “politicized prosecutions” from their political rivals after leaving office.

This, they argue, would have a “chilling effect” on a president’s ability to make the bold and decisive actions required to protect the national interest, undermining the vision of a strong, energetic executive articulated by the Founding Fathers. They view broad immunity as essential to preserving the power and effectiveness of the presidency itself.

The American Civil Liberties Union (ACLU) (Against Immunity): The ACLU has condemned the Supreme Court’s ruling as a “dangerous precedent” that places the president “substantially above the law” and gives future presidents a “blank check to break the law.”

They argue that the decision is contrary to the fundamental constitutional principle that the United States has a president, not a king, and that no one is above the law. The ACLU contends that accountability for criminal acts is essential for a functioning democracy and that granting immunity emboldens authoritarianism and corruption.

They have gone so far as to call for a constitutional amendment to overturn the Court’s decision and restore presidential accountability.

The Cato Institute (A Nuanced, Libertarian View): The libertarian Cato Institute offers a more evolving perspective. Initially cautious about prosecuting a former president, their scholars worried about the dangers of criminalizing policy differences and setting off cycles of retribution.

However, they came to believe that the specific evidence of Trump’s efforts to overturn the 2020 election met the “appropriately high bar” for prosecution. They now argue that the danger of not prosecuting in such an extreme case is greater than the danger of prosecuting, as it would embolden future misconduct and threaten civic peace more profoundly.

They see the current moment as the culmination of a long-term trend of consolidating power in the executive branch, a trend that they believe Trump is systematically exploiting.

The Supreme Court’s immunity ruling, while framed as a shield to prevent a “chilling effect” on presidential action, may have created a far more potent and dangerous chilling effect on the rest of the government and civil society.

By granting a president absolute immunity for their use of the Justice Department, the Court has empowered a president to direct the full force of federal law enforcement at a political opponent, a critical journalist, or a government whistleblower without fear of personal criminal liability.

This creates a powerful incentive for self-censorship and inaction among the very people and institutions meant to provide checks and balances on presidential power. The “chilling effect” has not been eliminated; it has been inverted and redirected from the president to the public.

The Ripple Effect: Consequences for American Democracy

The decision to launch investigations into a past administration would not occur in a vacuum. It would send powerful ripples through the entire American political system, with potentially transformative and long-lasting consequences for the nature of governance, the intensity of political polarization, and the stability of the rule of law itself.

The Chilling Effect on Governance and Dissent

One of the most immediate and tangible consequences would be the creation of a “chilling effect” on free expression and effective governance. This phenomenon occurs when individuals or groups self-censor or refrain from certain actions for fear of government retaliation or prosecution.

This could manifest in several ways. First, it could deter qualified and principled individuals from entering public service. The prospect that their policy advice or administrative decisions could be retroactively criminalized by a future administration with a different political agenda would make government work a far more perilous endeavor.

Second, it would have a devastating impact on whistleblowers and government critics. When an administration openly targets former officials who spoke out against it, like Miles Taylor and Chris Krebs, and threatens to blacklist law firms that represent political opponents, it sends an unmistakable message to current and future officials: dissent will be punished.

This climate of fear could effectively silence those who would otherwise expose waste, fraud, and abuse of power, gutting the protections that are essential for government accountability.

Finally, this chilling effect could extend to the broader public, including journalists and civil society organizations. As Justice Sonya Sotomayor warned in her dissent in the presidential immunity case, if a president can use the Justice Department to prosecute political enemies or members of the press without fear of criminal penalty, the press becomes “newly, and gravely, vulnerable.”

This could lead to a “freezing effect” on political discourse, where citizens and the media become too intimidated to criticize the government, fundamentally weakening a core pillar of democratic society.

Fueling the Fire of Political Polarization

The use of the justice system for political ends would almost certainly pour gasoline on the fire of American political polarization, which has already reached historic levels.

This could trigger escalating cycles of retribution. If one administration successfully prosecutes its predecessor, it would open a “Pandora’s Box,” creating immense pressure on the next administration from the opposing party to do the same.

The peaceful transfer of power, a hallmark of American democracy, could transform into a moment of extreme peril for the outgoing party and its officials. This dynamic would entrench a permanent state of political warfare, where “lawfare” becomes a standard tool of governance.

Such a cycle would decimate public trust in the impartiality of the justice system. When prosecutorial decisions are widely perceived as being driven by partisan motives, the law loses its moral authority. Citizens may come to see not one system of justice for all, but two: a lenient one for political allies and a punitive one for political enemies.

Ultimately, this could transform the nature of American elections. When the stakes of losing an election include the possibility of investigation and imprisonment for the defeated party, political competition ceases to be a debate over policy and becomes a zero-sum, existential contest for power and survival.

In such an environment, compromise becomes impossible, and the risk of political instability and even violence increases, as losing is no longer an acceptable outcome.

The Rule of Law at a Crossroads

At its core, this entire debate is about the future of the rule of law in the United States. The principle of a “government of laws and not of men,” famously articulated by John Adams, is a cornerstone of American democracy.

It means that all persons and institutions, including the government itself, are accountable to laws that are publicly known, equally enforced, and independently adjudicated.

The weaponization of the justice system poses a direct threat to this principle. It raises the specter of a “dual state” or a “two-track legal system,” a concept used by scholars to describe regimes where the formal, public legal system is subverted by a parallel system that operates according to the personal whims and political needs of the leader.

This is the ultimate danger of a politicized DOJ: that the law ceases to be a shield that protects all citizens equally and instead becomes a sword wielded by the powerful against their opponents.

The United States has arrived at a moment of profound tension between two of its most cherished ideals. On one hand is the principle that “no one is above the law,” which demands accountability for even the most powerful officials.

On the other is the principle that justice must be blind and apolitical, which demands that the awesome power of the law never be used as a political weapon.

The potential actions of a new administration threaten to place these two principles in direct and irreconcilable conflict, forcing a national reckoning over which is more foundational to the American experiment in self-government.

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