The Trump administration asked the Supreme Court to lift a lower-court ban on Big Bend border wall projects, arguing the order blocks efforts to stop illegal crossings and drug smuggling.
The Justice Department on Wednesday urged the high court to clear the way for border wall and related infrastructure work across a remote stretch of West Texas that includes Big Bend National Park. Solicitor General D. John Sauer sought emergency relief so the Department of Homeland Security can resume barrier construction in the Big Bend Sector while litigation continues.
CBS News reported that U.S. District Judge Kathleen Cardone had already barred DHS from building barriers or related infrastructure, or from any construction or ground-disturbing activity, in that sector. Cardone rejected the administration’s request to pause her own order shortly before the Justice Department turned to the Supreme Court.
The fight lands on a core piece of President Trump’s immigration agenda: physical barriers where illegal entry and drug traffic remain a problem. The government says Big Bend is one of those places. Challengers say the numbers do not justify the project and that federal officials overreached on the legal waivers used to move it forward.
In the emergency filing, Sauer put the stakes in plain terms.
Solicitor General D. John Sauer wrote:
"The district court's injunction significantly frustrates the government's ability to stop the flow of illegal aliens and drugs across the southern border,"
He tied the project map to enforcement data, not scenery.
Sauer also wrote:
"The Secretary identified the Big Bend project areas at issue because of the high rates of illegal-alien crossings and drug smuggling in the region over the past several years."
The Justice Department said the government has already awarded contracts for five border-barrier projects in the area. Officials describe a plan for border walls and roads spanning more than 300 miles, including 30-foot bollard walls running from Fort Quitman, Texas, toward Closed Canyon in Big Bend Ranch State Park.
Customs and Border Protection said construction on a 47-mile stretch in the Big Bend region began last month. The agency also said the proposed wall itself would not cut through Big Bend National Park, though other infrastructure, patrol roads, detection technology, and roughly 17 miles of vehicle barriers, would operate in the broader park area.
The administration announced in February that DHS would build barriers and roads in the Big Bend Sector. Then-Homeland Security Secretary Kristi Noem invoked waiver authority under a 1996 federal immigration law that lets the secretary set aside legal requirements judged necessary for quick construction of physical barriers and roads near the southern border. The stated purpose of that authority is to deter illegal crossings in areas of high illegal entry.
Secretary Markwayne Mullin, who succeeded Noem after her firing, issued two additional waivers so CBP could build barrier systems. Court findings later covered waivers issued between February and July.
In April, an environmental nonprofit, a professional riverboat guide, and a religious organization dedicated to preserving the Sacred Heart of the Church of Jesus along the Rio Grande sued to stop the project. Earlier this month, Judge Cardone granted their request for a preliminary injunction. She found that Noem and Mullin exceeded their authorities when they issued the waivers, and she blocked DHS construction activity across the sector.
That order reaches far beyond a single job site. The Big Bend Sector covers more than 500 miles of the U.S.-Mexico border and 77 counties in Texas, more than a quarter of the southern border by the plaintiffs’ court filings.
The government told the courts that more than 89,000 people were apprehended trying to cross illegally in the Big Bend Sector between 2021 and 2025. That is the enforcement case for treating the stretch as an area of high illegal entry and drug smuggling.
Plaintiffs answered with a different cut of the same border math. Court filings they highlighted show annual apprehensions in Big Bend ranged from 0.3% to 2.2% of total border-wide apprehensions. They argue the sector ranks last among the seven sectors on the southern border for apprehensions, even though it covers a huge share of the line.
Those competing numbers now sit behind a practical result: contracts awarded, miles of planned barrier, and a district judge’s order that freezes ground-disturbing work while the Supreme Court decides whether the injunction should remain in force for now.
The project drew pushback earlier this year from lawmakers in both parties, cattle ranchers, and local law enforcement in Texas after photos and videos spread online of bulldozers arriving at Big Bend National Park. CBP Commissioner Rodney Scott responded by pausing construction inside the park until the end of September.
That pause did not end the larger plan. It also did not satisfy the plaintiffs, who kept pressing in court until Cardone’s injunction halted barrier and infrastructure work across the sector. The administration’s Supreme Court request seeks to reverse that halt on an emergency basis so construction can resume pending further review.
For national readers, the legal mechanism matters. A preliminary injunction is an early court order that can stop government action before a full trial. An emergency application to the Supreme Court asks the justices to lift or narrow that order quickly when the executive branch says border enforcement is being blocked in real time.
Trump has made a southern border wall a hallmark of his immigration agenda for the last decade. Big Bend is the latest test of whether that agenda can move from announcement and contracts to steel in the ground when activists, a district judge, and waiver disputes stand in the way.
Open borders theories do not stop fentanyl or illegal crossings. Physical barriers in high-traffic corridors still do, if courts allow the work to proceed.
