Department of Homeland Security Secretary Markwayne Mullin is considering curbing Customs and Border Protection services at major US airports in sanctuary cities.The proposed policy, which would halt international travel processing after the FIFA World Cup, aims to compel local governments to cooperate with federal immigration detainer requests.Industry executives and Transportation Secretary Sean Duffy have warned that these staffing cuts would trigger severe economic disruption and global air travel chaos.This standoff underscores the escalating friction between federal mandates and local jurisdictional autonomy regarding immigration enforcement.