Republican Sen. John Cornyn of Texas is pushing back against the Trump administration's decision to build a border wall through Big Bend National Park and Big Bend Ranch State Park, arguing that the construction could inflict lasting damage on the region's environment, cultural heritage, and economy.
In a letter released Tuesday, Cornyn detailed the concerns of local residents and park advocates, who fear that the barrier—along with its accompanying lighting systems, access roads, and maintenance corridors—would mar the natural landscape, threaten Native American sites, and disrupt wildlife migration. The senator also noted that the wall could restrict public access to the Rio Grande River and undermine the tourism industry, which serves as a critical economic engine for the area.
“Many residents that live and work around the parks are also concerned that a physical wall... would (1) ruin the beauty, landscape, and wildlife of the park, (2) threaten culturally significant Native American sites, (3) disrupt wildlife migration, (4) limit access to the Rio Grande River, and (5) significantly harm the local economy as tourism is a major economic driver for the region,” Cornyn wrote.
The senator added that some residents believe the rugged terrain itself already functions as a natural deterrent to illegal immigration, questioning the necessity of a physical structure in such a remote and challenging environment.
The letter arrives as construction on the wall has begun in the park, which is situated along the bend of the Rio Grande and is known for its dramatic mountain ranges, river canyons, and desert vistas. Earlier this year, then-Homeland Security Secretary Kristi Noem waived several environmental regulations to accelerate the project, a move that drew criticism from conservation groups and some lawmakers.
Cornyn’s stance is notable given his recent political trajectory. He lost a GOP primary to Texas Attorney General Ken Paxton, who had the backing of former President Trump. Despite that setback, Cornyn has remained a key figure in Senate negotiations, including over the confirmation of Todd Blanche as attorney general.
The border wall has been a signature priority for Trump, particularly during his first term, and the administration has shown renewed urgency in advancing construction along the southern border. However, the Big Bend project has sparked a fresh round of debate over the balance between border security and environmental preservation.
The Department of Homeland Security has not yet responded to requests for comment on Cornyn’s letter.
As the administration pushes forward, the concerns raised by Cornyn highlight the ongoing tension between federal infrastructure goals and the protection of national parks, a conflict that is likely to persist as the wall takes shape in one of Texas’s most iconic natural areas.
