The Executive Order Cascade and the Federalism Question Nobody Wants to Answer Simply
When the Trump administration issued its January 2025 executive orders expanding interior immigration enforcement, the policy seemed straightforward on its surface. The federal government would intensify arrests of undocumented immigrants already living in the country, prioritizing workplace raids and community sweeps over border apprehensions. Yet within weeks, at least eleven governors issued their own executive directives sharply limiting what state law enforcement could do to cooperate. California, Illinois, Colorado, and New York led the charge, but they were joined by officials in Minnesota, Michigan, Connecticut, Delaware, Rhode Island, Vermont, and Washington. This was not political theater. These governors were making concrete operational choices about whether state police, highway patrols, and sheriffs would participate in federal immigration operations.
The constitutional architecture underlying this standoff matters more than the headlines suggest. Immigration enforcement is explicitly federal authority. States have no sovereign right to set immigration policy themselves. Yet the federal government cannot actually carry out nationwide enforcement without some state and local participation. ICE has roughly 20,000 agents across the entire country. Without cooperation from local police who encounter people during traffic stops, welfare fraud investigations, and other routine interactions, the federal enforcement apparatus hits hard walls. The governors understood this leverage. They also understood the costs to their states of helping.
This is where the incentive structure gets genuinely complicated. States that restrict police cooperation with ICE risk losing federal law enforcement grants. State economies become more fragile when large immigrant populations face deportation pressure, since these populations fill labor gaps and pay taxes. Local police chiefs in sanctuary jurisdictions report that immigrants are less likely to report crimes when they fear police will initiate deportation proceedings. Meanwhile, governors who cooperate fully face pressure from immigrant advocacy groups and possible economic boycotts. The choices are not between good and bad policy. They are between different configurations of real harm and real benefit.
The Courts Step In: Preemption and the Northern District’s July Decision
The Department of Justice filed federal preemption lawsuits against four states by mid-2025, arguing that state restrictions on police cooperation violated the supremacy clause and interfered with federal immigration authority. These are serious constitutional claims with real teeth. The federal government has won preemption cases before. It can withhold federal funding. It can prosecute state officials for obstruction of federal enforcement. The legal ground suddenly became hostile to sanctuary jurisdictions in ways it had not been since the late Obama administration.
Then, in July 2025, the U.S. District Court for the Northern District of Illinois issued a preliminary injunction that blocked portions of the federal enforcement directive. A federal judge appointed under George W. Bush found that at least some aspects of the administration’s enforcement push likely violated constitutional constraints or statutory requirements. The injunction did not invalidate the entire enforcement program. It did not declare sanctuary policies constitutional. What it did was pump the brakes on the federal government’s ability to compel state cooperation through regulatory pressure. The opinion suggested that however broad federal immigration authority might be, it still faced limits when it came to commandeering state resources.
The preliminary injunction mattered because it changed the strategic calculus. Governors who had hesitated about restricting police cooperation suddenly had cover from a federal court. The legal risk of challenging the federal government dropped, at least temporarily. Appellate courts could still overturn the decision, and the Supreme Court might eventually clarify the constitutional question. Until then, though, state officials could justify their policies as obedience to a federal court order rather than defiance of executive authority.
The Enforcement Numbers: What Actually Happened on the Ground
ICE reported over 185,000 interior arrests in Fiscal Year 2025, the highest annual total since 2011 according to Department of Homeland Security operational data released in November. This figure is genuinely staggering. It represents a massive deployment of federal enforcement resources. It also reveals something crucial about how the sanctuary policies actually functioned in practice. Even with eleven major states restricting local police cooperation, federal immigration enforcement still managed to arrest more people than it had at any point in the previous fourteen years.
How? Several mechanisms worked simultaneously. First, ICE expanded its own field operations, deploying more agents and resources to states and localities that did cooperate. Second, workplace raids continued with force, particularly targeting agricultural operations and construction sites. Third, private immigration detention facilities became central to operations, creating a supply chain that absorbed the increasing volume of arrests. Fourth, and most subtly, local police in non-sanctuary jurisdictions compensated by increasing their own cooperation levels, sharing information and holding people for ICE pickup at higher rates than before.
This reveals the economic incentives at play. In states where governors restricted cooperation, local law enforcement budgets did not automatically suffer. Sheriffs in California and Illinois still received federal grants for other purposes. But jurisdictions that reversed course, or never implemented sanctuary protections in the first place, became priorities for grant funding and partnership agreements. Money followed cooperation. This is how federalism actually works in practice, often well beneath the level of formal legal doctrine.
State Legislatures: 47 Bills and 14 Laws, Each One a Choice About Compliance
State legislatures were not passive observers. The National Conference of State Legislatures tracked 47 bills introduced in 2025 dealing specifically with state and local enforcement of federal immigration priorities. Fourteen of them became law. This legislative activity raises deeper questions about what these states actually wanted to accomplish. Were they trying to obstruct federal enforcement? Protect vulnerable populations? Preserve police resources for local priorities? The answer varied by state, and the variation matters.
Some states, like California and New York, passed laws explicitly barring police from cooperating unless federal authorities obtained judicial warrants first. Other states, including some with Republican governors, passed laws mandating cooperation with ICE but adding budget provisions to offset local law enforcement costs. Still others passed laws creating state-level immigration task forces that ostensibly helped federal enforcement while maintaining state oversight of how that enforcement happened within their borders. The diversity of approaches reveals something real: states were not locked into two simple positions of cooperation or obstruction. They were negotiating the terms on which federal enforcement would happen within their borders.
This legislative activity also created fragmentation. A company operating across state lines suddenly faced different legal requirements about what information it could share with federal authorities depending on where its plants or offices were located. A trucking company in Colorado faced different rules than one in Texas. That fragmentation carries real economic costs, which fed back into the political debate. Business groups in sanctuary states argued that clear rules favoring cooperation would actually reduce compliance burdens, while civil rights advocates argued that fragmentation protected diverse communities. Neither was entirely wrong.
The Crime Question: What the Data Actually Says About Safety
One of the central claims in the national debate held that sanctuary policies made communities less safe by preventing police from cooperating with federal enforcement. A September 2025 study from the Stanford Immigration Policy Lab examined this question directly and found something striking: counties with sanctuary policies experienced no statistically significant difference in violent crime rates compared to non-sanctuary counties. The researchers controlled for demographic factors, economic conditions, and policing resources. The finding held across multiple specifications.
This does not prove that sanctuary policies improve safety or that cooperation with federal immigration enforcement hurts it. Correlational research cannot prove causation, and crime rates depend on many factors beyond immigration enforcement choices. But the Stanford study did demolish one version of the political claim that sanctuary policies demonstrably endangered public safety. Governors supporting these policies could point to the research. Federal officials arguing that obstruction cost lives had a harder empirical foundation than they claimed. This is exactly how evidence should function in policy debates: narrowing rather than settling disagreement, establishing shared facts even when people disagree about what to do with them.
The Stanford Immigration Policy Lab Research also pointed toward a deeper question about what actually drives crime. To the extent that immigration enforcement decisions affect public safety, the relationship is probably indirect. When immigrants fear police because police are also immigration agents, they report crimes less frequently. Criminals exploit that silence. The question is not whether immigration enforcement exists but how it is structured. This is why the debate over local cooperation matters. It shapes whether police are tools of immigration enforcement or whether immigration enforcement remains a separate federal function, which in turn affects whether immigrants trust local police to protect them from crime.
What Comes Next: The Ongoing Tension Without Easy Resolution
By the end of 2025, the basic structure of this conflict had settled into a sustainable stalemate. Federal enforcement continued at high levels with ICE conducting its own operations. States restricted cooperation where they could. Courts issued preliminary injunctions that suggeste
