Homeland Security Secretary Markwayne Mullin said Tuesday that his department is preparing to halt the processing of international flights at airports in sanctuary cities, a direct response, he said, to local officials who obstruct federal immigration enforcement while still expecting federal services at their airports.
Mullin made the announcement on Fox News, framing the proposal as a matter of basic fairness. Cities that refuse to cooperate with DHS on immigration arrests, he argued, should not expect Customs and Border Protection agents to keep staffing their international terminals.
The plan has not been initiated. But Mullin's language left little room for ambiguity about where the administration is headed, and the list of cities that could be affected reads like a Democratic stronghold map. Newsmax reported that targeted cities include Boston, Denver, Philadelphia, Chicago, Los Angeles, New York City, Newark, Seattle, and San Francisco. More than 50 million international travelers arrived through three major New York airports alone last year.
The immediate trigger was a weekend confrontation at Delaney Hall, an immigration detention center in Newark, New Jersey. Protesters gathered at the facility, and Mullin said DHS employees were barricaded from entering and leaving. Sen. Andy Kim (D-N.J.) was pepper sprayed during an interaction with immigration agents at the site, though details of that incident remain sparse.
Mullin tied the unrest directly to his policy proposal. As The Hill reported, the secretary laid out his reasoning in plain terms on air:
"They're barricading our employees from coming in and out of the facility. Then, why are we processing international flights into the airport there? And I, we are currently, which we're not initiating yet, but we're currently drawing up plans to say, listen, these sanctuary cities where the local radical-left Democrats aren't allowing us to do our jobs and enforce federal laws, then we shouldn't be processing international flights into their cities either."
He added a line that distilled the administration's position to its core logic:
"Because they don't want us to enforce immigration, but they want us to process immigration at their facilities. Nothing about that makes sense to me."
It is a pointed argument, and one that sanctuary city defenders will struggle to answer on the merits. CBP agents at international terminals check whether noncitizens hold valid authorization to enter the country, whether that means a tourist visa, a work visa, or permanent resident status. The same federal workforce that sanctuary jurisdictions resist in one context is the workforce they rely on in another.
Breitbart reported that Mullin also cited the failure of local police in Newark to respond to DHS requests for assistance at the detention facility. That detail sharpens the administration's framing: it is not merely that sanctuary cities decline to participate in immigration enforcement as a policy matter. In this case, Mullin described a situation where local law enforcement did not show up when federal employees faced a physical threat.
The proposal amounts to leverage. If local governments want the economic benefits of international air travel, the tourism dollars, the cargo processing, the business connections, they need to accept that the federal agents who make those flights possible are the same agents who enforce immigration law elsewhere in their jurisdictions.
That is a coherent position, and it carries real weight. The administration has signaled this kind of move before, warning that it could restrict airport processing as a consequence of local noncooperation. Mullin's statement Tuesday moved the threat from hypothetical to operational planning.
The loudest objections came quickly and predictably. Juliette Kayyem, a former Obama-era DHS official, posted on X that the plan would backfire.
"Of all the bad ideas floated by this Administration, this one ranks. It has got to be real; Mullin wouldn't waste time like this unless it is a serious distraction plan. Planes don't divert to other airports. The flights will be cancelled, disrupting blue and red voters, impacting the airlines, and having no impact on immigration policy."
Aaron Reichlin-Melnick, a senior fellow at the American Immigration Council, echoed the concern on the same platform, warning that airlines "cannot divert large numbers of international flights from one city to another" and would instead "have to cancel flights en masse, causing enormous economic damage."
Both critics focused on disruption. Neither addressed the underlying question Mullin raised: why should the federal government staff airport operations in cities that actively impede the same agency's enforcement mission?
The disruption argument, in fact, works both ways. If halting flight processing would cause enormous economic damage to sanctuary cities, that is precisely the point. It means those cities depend heavily on a federal service provided by the same department they are fighting. The economic pain is not a bug in Mullin's plan. It is the mechanism.
Mullin's appointment to lead DHS signaled that the administration intended a more confrontational posture on immigration enforcement. This proposal fits that pattern. The former senator from Oklahoma was not installed to manage the status quo.
The sanctuary city model has always rested on a selective relationship with federal authority. Local governments accept federal funding, federal airport infrastructure, and federal law enforcement partnerships on crime, but draw the line at immigration. They frame this as a values choice. The administration frames it as obstruction.
Mullin's proposal forces the question into the open. Sanctuary jurisdictions cannot credibly argue that federal immigration agents should process millions of international travelers at local airports while simultaneously blocking those agents from arresting illegal immigrants in the same metro area.
The standoff over DHS operations is not new. Democrats walked away empty-handed earlier this year after a 42-day DHS funding shutdown failed to extract immigration concessions. The pattern is consistent: progressive leaders push confrontation on immigration, absorb the political cost, and then regroup for the next round.
What makes this moment different is the specificity of the threat. Mullin is not talking about withholding grants or issuing sternly worded memos. He is talking about pulling CBP agents out of international terminals. That is a concrete operational step with immediate, visible consequences for every traveler flying into a targeted city.
Several details remain unresolved. Mullin did not specify a timeline for finalizing the plans or announce which cities would be hit first. The legal authority for such a move, whether DHS can unilaterally redirect CBP processing away from specific airports based on local immigration policy, has not been publicly addressed.
No airline has issued a public statement. The travel industry's response, when it comes, will matter. AP News reported on growing worry within the travel industry after the administration reiterated its threat. If carriers begin lobbying sanctuary city mayors to cooperate with DHS rather than lobbying Washington to back down, Mullin's leverage play will have worked exactly as designed.
The pepper spray incident involving Sen. Kim also remains thin on detail. What happened, who initiated the confrontation, and whether Kim's presence at the facility was part of a coordinated protest effort, none of that has been fully reported.
Democratic leaders have a track record of casting their immigration standoffs as principled stands, only to have the record show otherwise. Whether this confrontation follows the same arc depends on whether sanctuary city officials blink, or whether they are willing to watch international flights disappear from their airports to make a political point.
Mullin's proposal is blunt. It will be called heavy-handed. But the logic is hard to argue with on its face: if a city refuses to let federal agents do their job, that city has no standing to demand those same agents keep doing a different part of the job that happens to be profitable.
Sanctuary cities wanted a fight with DHS. Now DHS is picking the battlefield, and it turns out the airport terminal is a lot harder to barricade than a detention center.