US Secretary of Homeland Security Markwayne Mullin speaks during a Cabinet meeting with US President Donald Trump in the Cabinet Room of the White House in Washington, DC, USA, 27 May 2026. Trump held the meeting with members of his Cabinet amid ongoing US-Iran negotiations. EPA/SAMUEL CORUM / POOL
“If things don’t change, we’re going to have to make this step pretty quick,” Secretary Markwayne Mullin told Fox News’ “Fox and Friends”, referring to the major United Airlines UAL.O hub near New York City.
Mullin complained that local police were not ensuring that federal immigration officials could enter and exit a New Jersey detention center and warned he could reassign customs officials from the airport. “If (Customs) isn’t there processing international flights, then those individuals when the airlines land won’t be permitted into the United States,” Mullin said.
US airlines were taking the threat very seriously and making calls to administration officials and lawmakers that suspending flights could have a devastating impact. United declined to comment.
Acting Attorney General Todd Blanche said later on Fox News that it was an “extreme” option to stop processing flights at all airports in sanctuary cities but needed to be considered.
“We have to talk about all of our options,” Blanche said. “The answer will ultimately be what makes the most sense and what does President Trump think we should do about this.”
On Tuesday, Mullin said the Trump administration was drawing up plans to stop processing international travelers and cargo at major US airports in “sanctuary cities” that have declined to cooperate with an immigration crackdown.
The move could effectively halt international air travel and commerce at major airports in Democratic states, with millions of foreign tourists expected to stream in for next month’s start of the FIFA World Cup.
The final will be held July 19 in East Rutherford, New Jersey, about 12 miles from Newark airport.
Last week, Reuters and other media reported that Mullin had privately told US travel executives his department could opt to stop customs and immigrations processing of international travellers.
The US Justice Department published a list of so-called sanctuary cities and states that included many cities with major international airports including Boston, Denver, Philadelphia, Chicago, Los Angeles, New York City, Newark, Seattle and San Francisco.
Mullin first publicly made the threat in April.
Democrats say reforms are needed to rein in abuses by Immigration and Customs Enforcement and Customs and Border Protection, including the killing of two US citizens in Minneapolis in January.
The US Travel Association said halting international travel at major airports would have devastating consequences for the travel industry and communities dependent on international visitors.
More than 50 million international travelers arrived at the three major New York airports alone last year.
Reducing customs staffing at major airports would disrupt operations significantly for carriers, travelers and the flow of international cargo, Airlines for America, a grouping of major passenger and cargo airlines, said.
During a congressional hearing last week, Transportation Secretary Sean Duffy did not offer support for halting international air travel at some airports. “We shouldn’t shut down air travel in a state that doesn’t agree with our politics,” Duffy said.
(Reporting by David Shepardson; Editing by Chizu Nomiyama and Nick Zieminski)