Michigan Attorney General Dana Nessel and the city of Romulus filed a federal lawsuit Tuesday against the U.S. Department of Homeland Security, challenging the federal government’s plan to convert a Romulus warehouse into an ICE detention facility. The suit marks one of the most direct legal confrontations between Michigan and the Trump administration over immigration enforcement, and it lands squarely in the middle of a metro Detroit community that sits adjacent to Detroit Metropolitan Airport and houses a significant working-class immigrant population.
The lawsuit, filed in federal court, asks a judge to halt the conversion before it moves forward. Nessel’s office announced the filing on March 24, and the legal challenge represents a coordinated effort between state and municipal government, a pairing that signals how seriously both see this as a fight worth taking on.
The Legal Argument
The core legal question is whether the federal government can simply designate a private warehouse for ICE detention without complying with state and local zoning laws, environmental review processes, and public notice requirements. That is the terrain Nessel and Romulus are contesting.
Federal agencies generally operate under broad preemption powers when it comes to immigration enforcement. But that preemption does not automatically exempt the federal government from every state and local land use requirement. Courts have repeatedly distinguished between states trying to obstruct federal immigration authority and states asserting legitimate regulatory interests in how physical facilities are built and operated within their borders.
Nessel’s office is arguing that the warehouse conversion sidesteps the kind of regulatory review that any other institutional facility would face. Detention centers require specific infrastructure: plumbing, ventilation, medical capacity, and security systems. Building out those systems inside a structure not designed for that purpose, without going through the normal permitting and inspection process, creates real public safety and liability concerns that Michigan has a legitimate interest in addressing. (See also: Google DTE Energy Data Center Deal Southeast Michigan)
There is also a procedural argument embedded in the suit. If DHS moved to establish this facility without proper environmental review under the National Environmental Policy Act, that opens another avenue for a federal court to pause the project while the review gets completed. NEPA claims have successfully delayed federal construction projects before, and they do not require a court to take sides on immigration policy at all.
What Romulus Has at Stake
Romulus is a city of roughly 24,000 people. It is not a sanctuary city, and it has not historically positioned itself as a liberal outpost on immigration issues. That makes its decision to join this lawsuit more significant than it might first appear. This is not a political gesture. Romulus city officials are responding to a concrete, local problem.
A large-scale ICE detention facility operating inside a repurposed warehouse creates immediate practical issues for the city. Detention facilities require water and sewage capacity at institutional scale. They generate traffic, security perimeters, and a demand for emergency services. The city’s infrastructure was not designed to support that kind of use at this location, and the city did not consent to it.
Beyond infrastructure, there is the question of community character. Romulus borders communities across Wayne County where immigrant families live and work. Families with mixed immigration status, some members documented and some not, are a documented reality in the region. A detention facility in Romulus would function as a processing and holding hub for the broader metro Detroit area. That changes the relationship between federal enforcement and local community in a very direct way. People get detained, held, and potentially deported from a building down the road from neighborhoods they lived in.
City officials clearly weighed those factors. Joining a lawsuit against the federal government carries its own risks, including potential friction over federal funding streams that flow to local governments. The decision to file suggests those officials believe the risks of the facility outweigh the risks of the legal fight.
Michigan’s Pattern of Resistance
This lawsuit fits inside a broader pattern. Since the beginning of 2025, Nessel’s office has been one of the most active state attorney general offices in the country when it comes to challenging federal executive actions on immigration, civil rights, and regulatory rollbacks. Michigan joined multistate coalitions on several fronts, and Nessel has filed or co-filed actions targeting deportation procedures, due process protections for migrants, and federal funding threats to sanctuary-adjacent jurisdictions.
The Romulus suit is different in one key respect. It is not a multistate coalition action. It is Michigan and one Michigan city, acting together on a specific local grievance. That focused framing may actually make it more effective in court. Judges are often more receptive to narrowly scoped challenges rooted in concrete, site-specific harms than to broad ideological challenges to federal immigration policy.
Michigan’s posture also reflects the demographic and economic reality of the state. The agricultural sector in western Michigan depends heavily on migrant labor. The auto supply chain has significant immigrant worker participation. Metro Detroit has some of the largest Arab American and Yemeni American communities in the United States, populations with relatives and neighbors directly affected by enforcement patterns. Nessel is not operating in a political vacuum. She is responding to a constituency that has made immigration enforcement a top-tier concern.
Who Wins, Who Loses, What It Means
If the lawsuit succeeds, even temporarily, it creates an important precedent. It establishes that local governments and state attorneys general can use land use law and environmental review requirements as effective tools to slow or block the rapid, ad hoc establishment of detention infrastructure. That matters not just for Romulus but for any metro Detroit community that might find itself targeted for a similar conversion in the future. Warehouses and industrial properties are plentiful in the region. The same playbook could be applied elsewhere if this one goes unchallenged.
If the lawsuit fails, the federal government gains a clearer runway to establish detention facilities quickly without local consent or regulatory review. That outcome would accelerate ICE’s ability to build out detention capacity in Michigan and other states facing legal resistance, bypassing the friction points that municipalities like Romulus are trying to create.
A middle outcome is arguably most likely in the short term. A federal judge issues a temporary restraining order or preliminary injunction while the case proceeds, pausing the project for weeks or months, forcing DHS to respond in court, and giving the public more time to see what is actually being planned. That delay alone has value, both for legal strategy and for community organizing.
The federal government will almost certainly argue that its immigration authority preempts the state’s claims entirely. It will frame the lawsuit as an attempt to nullify federal enforcement power. That argument will get a hearing. But preemption is not a blank check, and courts have carved out significant space for state and local regulatory authority even in areas where federal law is dominant.
The Broader Detroit Story
For metro Detroit specifically, this case is a preview of what the next several years of immigration enforcement could look like. The region has experienced major enforcement actions before, including factory raids and community sweeps that disrupted neighborhoods in Dearborn, Hamtramck, and Warren. Each of those episodes produced lasting fear and economic disruption in communities that were not themselves the primary targets.
A permanent detention facility in Romulus would mark a qualitative escalation. It would mean the infrastructure of enforcement is now embedded locally, not just passing through. That changes the psychology of enforcement and the lived experience of immigrant families across the metro area.
Nessel and Romulus are trying to stop that before it starts. Whether a federal court agrees with their legal theory will determine how much power local governments actually have to shape the way federal immigration enforcement operates within their borders.
The next step is the federal government’s response to the complaint, followed by arguments on whether a preliminary injunction should be granted. Those proceedings will move quickly if the conversion is already underway. Romulus residents and metro Detroit’s immigrant communities will be watching closely.
