The Trump administration has asked the Supreme Court to let it resume border construction in Texas’ Big Bend region. In an emergency filing Wednesday, the government sought to lift an Oct. 2 court order that halted work along that stretch of the U.S.-Mexico border.

The administration argues that barriers and roads are needed in the Big Bend sector. It says leaving a 300-mile gap would create a security risk and maintains that the homeland security secretary can waive regulations that could delay construction.

The order stems from an April lawsuit against the Department of Homeland Security brought by the Center for Biological Diversity, Friends of the Ruidosa Church and a local river guide. They allege that the department bypassed a constitutional requirement for congressional approval. U.S. District Judge Kathleen Cardone found the challengers likely to prevail on at least one claim and at risk of irreparable harm without a court order.

Opponents also dispute the government’s description of Big Bend as an area of high illegal entry. The region spans about a quarter of the U.S.-Mexico border but accounted for 1.3% of border apprehensions in 2025.