MASS DEPORTATIONS: THE THREATS
While Trump made similar promises in his first term, he was never able to carry out deportations on that scale. That is because doing so is an enormous project that would entail restrictions on basic freedoms core to American life.
Consider the mechanics of the planned deportation effort. To deport immigrants who lack legal status on the scale Trump envisions, he would need to arrest millions of individuals; place them in removal proceedings before immigration judges; litigate those cases in the immigration courts; resolve any appeals; and then actually remove them from the United States — every year. Each stage of this process has its own requirements and procedures under the Constitution and the immigration statutes — and no part of it has ever operated at anything approaching the scale and speed that Trump’s plan requires. There can be no doubt that Trump would attempt to defy constitutional and other legal protections in service of his draconian goal.
Trump has also mischaracterized any decision not to detain an individual as a “catch and release” policy, and he will almost certainly seek to detain everyone he arrests through all of the stages of the removal process, in part to coerce them into giving up their rights to fight deportation. The federal deportation system is already massive; the Department of Homeland Security oversees more than 66,000 federal law enforcement officers, by far the largest of any single federal agency and half of all federal law enforcement officers across the country. Trump’s threats will require a vast expansion of this massive police force and huge sums of taxpayer money.
But even if significantly enlarged, the existing removal system will not even begin to approach the scale that Trump and his advisors will require. Instead, making America into a deportation nation will require extraordinary, unprecedented, and often illegal steps.
For example, mass deportations will require far more agents than Immigration and Customs Enforcement (ICE) has or could rapidly hire. So, Trump and his associates plan to build a new deportation force out of the military, federal agents, and state and local police. Trump and his advisor, Stephen Miller, have described plans to federalize state National Guard personnel and deploy them for immigration enforcement — arresting people in their homes and workplaces in communities across the nation and deploying National Guard troops, in some cases against the will of local officials and communities: “[i]f you’re going to go in an unfriendly state like Maryland, well, there would just be Virginia doing the arrest in Maryland.” Trump has also indicated that state and local police would also be deputized to make arrests and to identify targets — and granted “immunity” for any civil rights violations they commit. These officers would not only arrest specific, identified targets, but would “carry[] out workplace raids and other sweeps in public places aimed at arresting scores of unauthorized immigrants at once.”
It is tempting to regard these threats as overblown and calculated merely for political campaign purposes. But in recent months, Trump has repeatedly sought to rationalize his plans for mass deportation, blending military and national security rhetoric with xenophobia. When asked about the legality of using the military against civilians, Trump retorted that, in his view, “these aren’t civilians.”
Trump’s deportation dystopia, if realized despite all of the legal, practical, and moral barriers, would fundamentally reshape American life. People across the country would experience armed military personnel, federal agents of all stripes, state and local police, and potentially even police from other states conducting raids and sweeps in their neighborhoods and at their workplaces. People of all immigration statuses, including U.S. citizens and lawful permanent residents, could be investigated, questioned, and even arrested by these agents if they are at a location that the deportation force decides to “hit.”
And that is only the first stage of the process — arrest. Actually processing and deciding all of the resulting cases is an administrative and judicial process that cannot practically be farmed out to other agencies. Carrying it out on Trump’s scale will require bloating the removal system beyond all reason.
The Trump team is therefore looking for any excuse, no matter how improbable, to avoid the legally required procedures for determining whether an individual can be removed. For example, Trump’s advisors have suggested that they might implement an extremist theory, invoking the Alien Enemies Act — an obscure law that has rarely been used since it was enacted in 1789 — to override these procedures. Trump will also likely seek to massively expand the use of a fast-track deportation procedure called “expedited removal,” even though applying that procedure in the interior would violate constitutional guarantees. And he could encourage or pressure states to create their own independent arrest and deportation systems separate from the federal one, as Texas has attempted with SB 4.
In anticipation of the massive scale of arrest and detention these plans will require, Trump’s advisors are already trying to get Americans used to the idea that the landscape will be dotted with “vast” immigrant detention camps. Trump could again attempt to divert funds from other purposes in order to build these camps, just as he did when building his wall.
RESPONDING TO MASS DEPORTATIONS: LEGAL ANALYSIS & LITIGATION RESPONSE
Trump’s plan would require his administration to trample on numerous fundamental protections set out in the Constitution and laws passed by Congress. It would therefore be vulnerable to legal challenge from multiple angles.
The Fourth Amendment
The Fourth Amendment prohibits unreasonable searches and seizures, including arrests and detentions without individualized suspicion. And the Fifth and Fourteenth Amendments guarantee the equal protection of the laws, including freedom from racial discrimination by law enforcement. There is no exception for immigration enforcement. Whether officers belong to ICE, Customs and Border Protection (CBP), military, police, or other agencies, they are required to abide by these basic rules.
Yet, experience from previous, more localized efforts at draconian, “zero-tolerance” interior immigration enforcement shows that these programs result in racial profiling, suspicionless interrogations and arrests, unjustified and pretextual traffic stops, and warrantless searches of workplaces and homes — all of which violate the Constitution. These kinds of violations are rampant in dragnet-style operations because there is no inherent mark that separates citizens and people with authorization to remain in the United States from undocumented people: not language, not place of birth, not even the manner of their entry into the United States. Accordingly, officers frequently resort to stereotypes or intuition in lieu of the factual basis that the law requires.
Perhaps the best-known recent example is Sheriff Joe Arpaio’s reign of terror in Maricopa County, Arizona. In the 2000s, Sheriff Arpaio launched an “operation … to go after illegals” and began to conduct “saturation patrols” to stop people, investigate their immigration status, and arrest them if officers suspected them of being undocumented. As litigation by the ACLU and its partners established, Arpaio’s immigration-enforcement sweeps racially profiled Latine residents of Maricopa County, in violation of the Fourth and Fourteenth Amendments. The Trump immigration plan promises to replicate this unconstitutional conduct on a massive scale.
The Fifth Amendment
The Fifth Amendment guarantees due process of law, and the Constitution’s Suspension Clause safeguards access to the writ of habeas corpus — a key protection against unlawful government action. The Trump deportation machine would violate these guarantees in at least two fundamental ways.
First, an across-the-board policy refusing to release anyone swept up by the machine pending their removal would violate Fifth Amendment protections against arbitrary or punitive civil detention. The ACLU has brought many cases asserting the rights of immigration detainees. And the Supreme Court has recognized that even noncitizens who have no “legal right to live at large in this country” have a liberty interest in “freedom from imprisonment.” While the Supreme Court has on occasion allowed “narrow detention polic[ies]” affecting discrete categories of noncitizens to stand, the broad Trump detain-everyone rule would go much further and could not be squared with fundamental constitutional protections.
Second, trying to sidestep the procedural protections embedded in the removal process would violate the Fifth Amendment and the Suspension Clause. The Trump administration took one step in this direction in 2019, issuing a rule that attempted to expand fast-track “expedited removal” procedures — which drastically curtail the ability of immigrants to defend against deportation — from the border into the interior of the country. As a result of litigation by the ACLU and its partners, the expanded authority went almost entirely unused, and the rule was later revoked by the Biden administration. Renewed efforts to end-run deportation procedures, whether through the expedited removal authority or otherwise, will meet renewed resistance.
There are even more legal barriers the deportation machine would have to overcome. Efforts to have states spin up their own deportation systems would violate 150 years of Supreme Court precedent establishing that only the federal government has that power — as courts have recently re-affirmed in litigation by the ACLU and partners that has blocked Texas’s SB 4 law.
Attempting to deploy the Alien Enemies Act in service of a mass deportation effort would run headlong into the limits built into the statute itself, which gives the President only limited authority to detain and deport “enemy aliens” during a “declared war” or an “invasion or predatory incursion” involving a “foreign nation or government.” And diverting funds to build detention camps could violate funding statutes, as did Trump’s 2019 diversion of funds to build a border wall.
Posse Comitatus Act
Finally, federalizing the National Guard and deploying military personnel for immigration enforcement would raise grave legal concerns. Since the founding of our nation, American institutions have carefully guarded against military involvement in domestic affairs. In addition to the Constitution itself, the Posse Comitatus Act generally forbids the use of federal military personnel for civilian law enforcement unless authorized by Congress. Congress strengthened the Act in 2022 and 2023 in response to the Trump administration’s use of active-duty military to respond to protests against police violence.
Trump’s team has suggested that they may try to circumvent these strong legal protections and norms by invoking the extraordinary authority in another law, the Insurrection Act. But that Act has never been used for a deportation machine like this before, and allowing this maneuver would essentially erase the critically important line between military and civilian affairs, with effects that could reach far beyond the deportation context.
In short, Trump’s threatened actions on immigration run counter to protections in the Constitution and statutes enacted by Congress. And we will make him answer for his lawlessness in the courts.
RESPONDING TO MASS DEPORTATIONS: CONGRESSIONAL ACTION ON TRUMP'S DEPORTATION FORCE AND MASS DETENTION
Trump’s aggressive plans are impossible without a massive funding increase. And despite the recent congressional acquiescence to expanded detention and unfair, ineffective enforcement policies, what we saw from congressional leaders during the first Trump administration gives us reason to believe advocacy can produce resistance in Congress during a second Trump term.
Trump’s vicious anti-immigrant rhetoric, coupled with his threats of raids on major cities, catalyzed serious political opposition in Congress — including members of Congress demanding access to immigrant detention sites, pressing for action on individual deportation cases, and calling out Trump’s anti-immigrant policies on social media and in press conferences. History suggests that congressional Democrats are more likely to stand against anti-immigrant policies when a Republican is in the White House and that the more Trump pursues his extremist agenda, which threatens longstanding U.S. residents and mixed-status families, the more likely members of Congress will be to assert their powers to thwart his ability to create a deportation police state.
Even in a divided Congress, pro-immigrant justice legislators can use Congress’ appropriations powers to deny ICE the operational resources necessary to launch the indiscriminate mass raids Trump surrogates have threatened. Congress can aggressively limit ICE Enforcement and Removal Operations’ budget through the annual congressional appropriations bill and deny supplemental funding requests that have historically led to waste and misuse of funds. Congress can prohibit the use of funds to detain families and either limit or completely defund the kinds of mass detention camps the Trump campaign has touted. Congress can also prevent the Trump administration from rapidly expanding ICE and CBP detention sites by requiring congressional notification and review as a condition of detention funding. Likewise, Congress can condition appropriations on members’ access to conduct regular, unannounced detention site visits, which will enable them to uncover and bring to light the abuses suffered by people trapped in detention. Finally, Congress can prevent the improper diversion of other appropriated funds, especially defense appropriations, by placing limitations on the reprogramming or transfer of federal funds.
The ACLU will work with coalition partners to leverage the appropriations process to resist the deportation machine.
In addition, we will seek aggressive congressional oversight of ICE’s tactics and actions on American streets — including through hearings, investigations, and subpoenas — to detect abuse.
As further discussed below, we expect Trump to send a bill to Congress on immigration and the border early in a second term. In any negotiation over comprehensive immigration reform, we will lobby Congress to expand funding and ensure meaningful access to legal representation for immigrants, who currently have no right to government-provided counsel in immigration court even though they have a constitutional right to due process and the right to counsel. We have cause for optimism: The Senate’s major bill on the border and asylum, a “bipartisan” compromise with Republican support when it was voted on in early May, would have codified the right to counsel for certain applicants for asylum for the first time and required the government to provide counsel to unaccompanied children under 13. This is a crucial due process safeguard: Studies show that detained immigrants with counsel are far more likely to win their immigration cases and secure release from detention.
If the Trump administration seeks to expand expedited removal to the interior, we will work with our partners to bring impacted families and community members to Capitol Hill to demand congressional action and spur a congressional backlash. Congress enacted expedited removal through the 1996 Illegal Immigration Reform and Immigrant Responsibility Act. Short of a full repeal of expedited removal across the board, we will urge Congress to use its appropriations powers to prevent ICE from conducting expedited removal against long-standing residents.
RESPONDING TO MASS DEPORTATIONS: CONGRESSIONAL ACTION ON CUSTOMS & BORDER PATROL (CBP)
Trump is likely to employ some of his harshest tactics at the border. Historically, Congress has done little to constrain Customs and Border Protection’s expansive policing or to create meaningful accountability for agents who abuse their authority, and Trump has suggested he will build on this legacy of impunity, expanding CBP’s operations through the use of the National Guard. Congress has acceded to ever more bloated budget requests, to the tune now of $19 billion in FY 24, making CBP by far the largest law enforcement agency in the United States.
We will lobby Congress to put meaningful constraints on CBP by limiting where border patrol forces can operate and restricting which law enforcement units can participate in these operations. We will also lobby for restrictions and reporting on racial profiling and unlawful detentions of residents within the 100-mile zone, and for mandatory reporting on the location of any new soft-side, temporary, or open-air detention facilities utilized by CBP to round up and hold people along the U.S. border. We will urge Congress to require CBP to report on checkpoints and roving patrols, including the number of U.S. citizens stopped and families separated at checkpoints or by these patrols.
RESPONDING TO MASS DEPORTATIONS: STATE & LOCAL GOVERNMENTS CAN PROTECT COMMUNITIES FROM MASS DEPORTATION DRIVE
The Trump administration will have difficulty executing its mass deportation plans without the acquiescence and participation of states and localities, and the ACLU is already identifying ways pro-civil liberties jurisdictions can ensure they are not complicit in tearing apart their communities.
We expect that in a second term, Trump will once again seek to expand ICE’s capacity through the 287(g) program, which taps law enforcement agencies across the country to identify and locate immigrants. Trump continues to spread lies about immigrants, touting a “new category of crime…called migrant crime” and blaming “Democratic-run cities.” In fact, numerous studies show that immigrants commit fewer crimes than U.S.-born people. Immigrants are less likely to be incarcerated for criminal offenses, and increases in immigration rates are related to a decrease in crime rates.
We are also concerned that Trump will solicit volunteers from law enforcement agencies in anti-immigrant jurisdictions to join in federal immigration enforcement operations and even participate in raids on so-called “sanctuary” cities, stoking animosity and partisan division along the way.
As part of a comprehensive strategic engagement with blue state governments, we will urge state governments to deny the federal government access to their law enforcement agencies and other state-held resources for purposes of immigrant detention and deportation — governors can act through executive orders, state attorneys general can issue guidance to law enforcement agencies, and legislatures can enact new measures or update existing law.
We know that many law enforcement leaders, concerned that open collaboration with ICE will diminish community trust and deter people from coming forward to report serious crimes, will decide not to collaborate in anti-immigrant enforcement measures. Short of prohibiting anti-immigrant collaboration altogether, states can enact measures requiring that prior to entering into an agreement to assist in immigration enforcement, state and local law enforcement agencies seek advance permission from the governor or other state officials, and that they notify the public and provide an opportunity for public comment.
On the other hand, Trump’s anti-immigrant rhetoric is likely to embolden racist and abusive local law enforcement officers, who will effectively act as badge-wearing vigilantes intent on assisting in the mass deportation drive. Many will engage in pretextual policing — using traffic stops and arrests for minor offenses to book people into local custody and funnel them into deportation, decreasing community-law enforcement trust and resulting in civil rights violations. State attorneys general and other elected officials can respond by robustly enforcing state laws against racial profiling, and launching their own civil rights investigations into state and local law agencies that show a pattern of traffic stops and arrests disproportionately targeting Black and Brown residents.
We will also urge governors, other state officials, and legislatures to act decisively to protect people from Trump’s mass deportation drive:
- Governors can issue pardons to immigrants for state criminal convictions that make them deportable, in consideration of their record of rehabilitation, contributions, and roots in the state.
- State legislatures can pass legislation that allows people to obtain a driver’s license without regard to their citizenship — ensuring they are not arrested and convicted of the offense of driving without a valid license, which would put them at higher risk for deportation.
- States can increase visa certifications for victims of certain crimes and human trafficking and, using the new deferred action process, for exploited workers. State legislatures can also pass so-called 364-day bills, which reduce people’s vulnerability to deportation by redefining the maximum penalty for a misdemeanor under state law — thereby avoiding a trigger for mandatory deportation under a draconian provision of federal law.
- State attorneys general can issue guidance to local prosecutors on considering the immigration consequences of the charges they are bringing to avoid inadvertently triggering deportation.
- States can also fund legal representation for immigrants facing deportation, and coordinate with community organizations and legal aid groups to ensure support for communities facing mass deportation raids.
We will also urge states and municipalities to refuse to take part in new mass detentions of immigrants. We will work in legislatures to pass measures prohibiting government contracts with ICE for detention. We will also support local movements against new detention sites and the leasing of county jail space to ICE.
Unfortunately, we know that governors of populous states like Texas, Florida, and Georgia — home to at least 2.9 million people who are undocumented — are eager to participate in arrests, deportations, and detention. And we expect the Trump administration will once again seek to punish so-called “sanctuary” cities for partisan reasons and to stoke fear in immigrant communities. We also expect a Trump administration to go after legal services and humanitarian services organizations that provide assistance to immigrants, further chilling advocacy and adding practical and financial barriers for nonprofit groups that normally provide representation and basic services to noncitizens. We will work with city officials to coordinate across state lines and provide support to residents and mixed-status families before and after deportation raids occur. It will be vital for local governments to help ensure that families can find their loved ones when arrested; community and faith groups can come together to deliver assistance in the form of childcare and food to families torn apart; and lawyers are on the ground and properly resourced to support impacted people. We will urge cities to band together to fund and coordinate deportation defense and assistance for people — even as they are torn from their community and shipped across state lines to ICE detention sites in other states.
RESPONDING TO MASS DEPORTATIONS: RECLAIMING THE NARRATIVE ON AMERICAN SUPPORT FOR FAIR AND HUMANE IMMIGRATION POLICIES
Finally, we recognize that winning policy fights requires winning the narrative battle over how America should think about immigrants and immigration, and the ACLU has been building a narrative shift campaign to that end. We will continue to use detailed new public opinion research and organizing tactics around major news events — which a Trump administration will create with some frequency — to create a strong counter-narrative to the Trump administration’s xenophobia and racism.
We will urge members of Congress, other elected officials, and influencers to play offense and reclaim the narrative on immigration in our country. They must debunk and forcefully reject the premises of Trump’s deportation drive while calling out the xenophobia and white supremacy underlying his policy proposals. The way that Trump is proposing we treat our neighbors and loved ones who are immigrants is completely out of step with our values and who we aspire to be as a nation. Congress should instead plan a series of hearings on the vast contributions of immigrants, including how they have helped strengthen our economy and American communities, and why immigrants deserve a fair process to become citizens.
Polls show that voters do not support cruel enforcement-only measures that betray core American values and put vulnerable people in danger. Proposals to ban asylum and separate families at the border are widely rejected by voters. A March 2024 Immigration Hub / GSG poll shows that 66 percent of voters in battleground states reject banning asylum, and 79 percent oppose reinstating family separation. Recent research conducted by the ACLU also showed that when candidates, regardless of party affiliation, adopt a balanced, solutions-focused approach to immigration that includes both managing the border and providing a road to citizenship for long-term residents, they outperform their opponents’ fear-based messages.
Instead of negotiating with the Trump administration on a so-called “border security” bill, we will push members of Congress to embrace the better policy and politics of putting forward their own vision for immigration reform. Sixty-eight percent of voters want a balanced approach to immigration that includes both border management — adequately staffing ports of entry and increasing processing capacity of people seeking protection — and pathways to citizenship for Dreamers and other longtime residents.