California Governor Gavin Newsom is blasting President Trump’s effort to rein in sanctuary policies by reconsidering federal customs staffing at airports, signaling yet another courtroom showdown over who controls America’s borders.
Story Snapshot
- Newsom is threatening new litigation as the Trump administration weighs reducing Customs and Border Protection services at international airports in sanctuary jurisdictions.
- The Department of Homeland Security proposal would leverage federal control over customs operations to pressure cities and states that refuse to cooperate with immigration enforcement.
- Newsom and California have a long history of suing Trump over immigration and federal authority, including fights about sanctuary policies and federalization of the National Guard.[4][5]
- Conservatives see the clash as a test of whether states can enjoy federal benefits like secure, efficient airports while openly undermining federal immigration law.[3]
Trump Administration Tests New Pressure Point: Airport Customs in Sanctuary Cities
The Trump administration is considering a new tactic in the long-running battle over sanctuary policies: scaling back federal customs operations at international airports located in jurisdictions that refuse to cooperate with immigration enforcement. Reporting indicates that the Department of Homeland Security is examining whether to reduce Customs and Border Protection staffing or services at airports in sanctuary cities as a way to push local leaders to abandon non-cooperation policies. This would shift the fight from abstract legal arguments to visible changes travelers actually feel.
According to coverage of the proposal, federal officials frame the move as a lawful reallocation of limited resources, arguing that cities which will not help enforce federal immigration law should not expect the same level of discretionary services. The idea is rooted in a broader pattern that has emerged over the past decade, where Washington uses federal “carrots and sticks” to encourage local cooperation on immigration while sanctuary jurisdictions insist they can decline to assist so long as they do not physically block federal agents.[5] That clash now appears headed straight to the jet bridge.
Newsom’s Legal Playbook: Turn Every Enforcement Tool into a Court Fight
Governor Gavin Newsom has already previewed his response, telling reporters that any attempt to pull or reduce customs services at California airports would be challenged as unlawful and economically harmful. Newsom argues that limiting customs operations would disrupt travel, damage local economies, and punish residents and businesses for state policy choices on immigration. His position echoes past California arguments that the federal government cannot use critical functions as leverage to coerce states into abandoning sanctuary frameworks.[3][5]
California has repeatedly used the courts to push back on Trump-era immigration enforcement tools.[5] Earlier fights involved efforts to condition federal grants on immigration cooperation and to rein in California’s statewide sanctuary law, which limits how local law enforcement engages with federal immigration authorities.[3][5] Litigation trackers show that California and allied cities have filed numerous suits challenging Trump policies on immigration, funding, and federal authority, winning some rulings that blocked particular funding penalties even as other questions remained unsettled.[5] Newsom’s latest threats fit neatly into that established pattern.
Federal Authority, Sanctuary Defiance, and What Is Really at Stake for Travelers
Sanctuary jurisdictions, including several major California cities, structure their policies around non-cooperation rather than overt obstruction, restricting when local police may share information or assist federal immigration agents.[3] Analysts describe this as a way for states and cities to signal opposition to strict immigration enforcement without directly interfering with federal officers. However, federal officials increasingly describe these policies as de facto obstruction that forces Washington to work harder and spend more to enforce national law.[3]
I asked Gov. Newsom about Trump administration considering cutting customs & border services at international airports in sanctuary cities.
Newsom signaled the state would likely sue.
"California, the future happens here first. It tends to as it relates to Trump…" pic.twitter.com/oLWT7hDUHe
— Ashley Zavala (@ZavalaA) May 28, 2026
That tension sits at the heart of the airport customs proposal. Customs and Border Protection operations at international airports are a uniquely federal function, run by federal officers at federal expense in federally controlled spaces. Supporters of the Trump approach argue that if sanctuary leaders want to distance themselves from federal immigration enforcement, Washington is under no obligation to provide them with top-tier customs services that keep their tourism and business travel humming. In this view, Newsom cannot have it both ways: undermining federal law while demanding federal perks.
Why This Clash Matters for Border Security, Commerce, and Constitutional Balance
Legal experts note that airport-specific disputes represent a new frontier in immigration federalism, expanding the battleground beyond grant conditions and police cooperation into core federal operations travelers touch every day. Existing sanctuary litigation has mostly addressed whether Washington can tie federal funds to immigration cooperation or override state limits on local law enforcement assistance.[3][5] The law is less developed on whether federal agencies may intentionally scale back their own services, such as customs processing, in particular jurisdictions based partly on policy disagreements.
Critics of the proposal warn that if the administration cannot clearly show an operational justification—such as resource constraints or measurable security gains—courts may view targeted cutbacks as political retaliation against disfavored jurisdictions. Supporters counter that every administration must set enforcement priorities, and that concentrating customs resources in communities that respect federal law is both common sense and fiscally responsible. For many conservatives, this is ultimately about restoring a basic principle: states and cities do not get to nullify federal immigration law while expecting Washington to quietly subsidize the consequences.
Sources:
[3] Web – [PDF] Newsom v. Trump – Ninth Circuit Court of Appeals
[4] Web – Trump wants to break California’s sanctuary state law: 5 things to …
[5] Web – East Bay Sanctuary Covenant v. Trump
