A federal judge denied the Tohono O'odham Nation's bid to block border wall construction along 62 miles of tribal land in Arizona, a ruling the Trump administration is calling its latest win on border security.
U.S. District Judge Richard Leon rejected the tribe's request for a preliminary injunction, finding that a presidential proclamation signed by Theodore Roosevelt in 1907 grants the federal government exclusive control over the first 60 feet of land along international boundaries. The Tohono O'odham reservation, which stretches across 2.8 million acres in southern Arizona's Sonoran Desert, was not formally designated until 1917, a full decade after Roosevelt's order took effect. That timeline proved decisive.
Leon ruled that the tribe had not shown the construction would unlawfully alter reservation boundaries or amount to illegal trespass. The government's case, he wrote, carried more weight than the tribe's claims of irreparable harm.
In his ruling, Leon was direct about the balance of interests at stake. Fox News Digital reported the judge's central finding:
"Given the national security and foreign policy considerations related to the border wall, deference to the government is warranted."
He went further, as the Washington Examiner detailed:
"Because plaintiff is unlikely to succeed on the merits of these claims, and because the remaining preliminary injunction factors favor the Government, I will DENY plaintiff's Motion for a Preliminary Injunction."
Leon, a George W. Bush appointee, also found that the government's interests in "securing the border, enforcing immigration laws, and ensuring public safety" outweighed the potential harm cited by the tribe. That language left little room for ambiguity about where the court came down.
The ruling represents one of several legal contests the Trump administration has fought over its immigration agenda. Courts have not always sided with the White House, the Supreme Court struck down an earlier executive order on birthright citizenship, forcing the administration to pivot to Congress for a legislative fix.
The legal backbone of the ruling rests on a document more than a century old. Roosevelt's 1907 proclamation declared that all public land within 60 feet of an international boundary falls under exclusive federal control. Roosevelt's stated rationale, as characterized in court filings, was blunt: the measure was necessary "as a protection against the smuggling of goods between the United States and the Republic of Mexico."
Leon noted the chronology. The proclamation predated the reservation's creation by ten years. That sequencing undercut the tribe's central claim, that wall construction would effectively shrink the reservation and constitute trespassing on sovereign tribal land.
The 62-mile stretch of the Tohono O'odham reservation that abuts Mexico sits in some of the most remote terrain along the southern border. The New York Post noted that this gap represents a significant stretch of potential wall construction, one that smugglers and illegal immigrants have long used precisely because of the lack of physical barriers.
The broader wall project has already covered substantial ground. Breitbart reported that approximately 700 miles of Trump's border wall have been constructed along the nearly 2,000-mile southern border. Filling the Arizona gap would close one of the remaining openings.
The tribe did not wait for the court to act before drawing its own line. On August 8, the Tohono O'odham Nation posted a warning on its Facebook page directed at anyone involved in wall construction:
"ANY construction related activities to the illegal and destructive border wall be warned, informed of trespass and escorted off the Nation's land by law enforcement."
Tribal members had also erected "no trespassing" signs after federal workers visited border sites to survey potential construction areas. The tribe's position was unambiguous: it viewed the wall as an illegal intrusion on its land and was prepared to use tribal law enforcement to enforce that view.
Leon's ruling effectively overrode those warnings. Whether the tribe intends to appeal remains unclear, the ruling addressed only the preliminary injunction, not the full merits of the case. But the denial means construction can proceed while the legal fight continues.
The outcome stands in contrast to other recent rulings that have backed the administration's immigration enforcement authority, including a Supreme Court decision upholding the government's power to deny reentry to green card holders accused of crimes. On border security, the courts have increasingly deferred to executive power, even when the opposition is fierce.
The ruling landed as DHS Secretary Markwayne Mullin's office released fresh border statistics. Daily apprehensions at the U.S.-Mexico border are down 94 percent compared to the Biden administration, per DHS, a figure the department says represents the lowest level in 30 years.
The Trump administration also celebrated 15 consecutive months of zero border releases at the U.S.-Mexico border, a milestone Just The News reported alongside the Arizona ruling.
Mullin framed the numbers as vindication of the administration's approach:
"Again this month, the results are clear: President Trump's border security agenda is restoring order and putting the safety of the American people first."
He added that DHS "remains focused on enforcing our immigration laws, securing the border, and ensuring those who enter our country illegally are removed swiftly. Thanks to the strong leadership of President Trump, we have the most secure border in history."
Those are administration claims, and the 94 percent figure comes from DHS itself. But the trend line is difficult to dispute: illegal crossings have fallen sharply under the current enforcement posture, and the physical wall, now cleared for another 62 miles, remains central to the strategy.
The administration has faced no shortage of institutional resistance on immigration, from congressional procedural roadblocks to tribal governments willing to deploy their own law enforcement against federal construction crews. Leon's ruling removes one of those obstacles. Others will follow.
Several pieces of the story are still missing. The ruling addressed only the tribe's request for a preliminary injunction, a legal tool meant to freeze the situation while a case is decided. The full case has not been resolved. Whether the Tohono O'odham Nation will appeal Leon's decision, or press its claims at trial, is unknown.
The specific sections of the reservation targeted for wall construction have not been publicly detailed. And the tribe's threat to use its own law enforcement to escort construction workers off tribal land raises a practical question Leon's ruling did not fully answer: what happens on the ground when federal crews arrive and tribal police are waiting?
For now, the legal path is clear. A 119-year-old proclamation written to stop smuggling along the Mexican border has been dusted off and put back to work, for exactly the same purpose Theodore Roosevelt intended.