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Official warns US could halt immigration, customs processing at ‘sanctuary city’ airports, sources say

By Thomson Reuters May 21, 2026 | 4:54 PM

By David Shepardson

WASHINGTON, May 21 (Reuters) – Homeland Security Secretary Markwayne Mullin privately warned that authorities could stop processing international travelers and cargo at major U.S. ​airports in “sanctuary cities” that have declined to cooperate ‌with the Trump administration’s immigration crackdown, sources told Reuters.

Mullin, who publicly made the threat in April during a Department of Homeland Security funding dispute, privately told travel executives last week that the department ‌could ​opt to stop customs and immigrations ⁠processing of international travelers at ⁠airports in cities such as Denver, Philadelphia, Chicago, Los Angeles, New York City, Newark, Seattle and San Francisco.

The Atlantic earlier reported Mullin’s comments to travel executives and ​cited sources as saying the move would likely occur some time after the end of the FIFA World ⁠Cup in the United States ⁠in July.

DHS declined to comment.

Airlines for America, ​which represents major passenger and cargo airlines, said reducing customs staffing “at ​major airports would have a devastating effect on ‌the airline and tourism industries, causing a significant operational disruption to carriers, travelers and the flow of international cargo.”

U.S. Travel, which represents major airlines, hotel chains, rental car firms ⁠and others, said on “domestic and international inbound travel alike, we urge governments at all levels to adopt policies that promote the ⁠free and efficient ‌flow of legitimate travelers.”

Transportation Secretary Sean ⁠Duffy said at a U.S. House hearing Thursday ​that ‌he was not familiar with Mullin’s remarks ​and did ⁠not express support.

“We shouldn’t shut down air travel in a state that doesn’t agree with our politics,” Duffy said

More than 50 million international travelers arrived at the three major New York airports alone last year.

(Reporting by David Shepardson; Editing ​by Cynthia Osterman)