The Fifth U.S. Circuit Court of Appeals voted 10-7 on Friday to lift a lower court injunction that had blocked Texas Senate Bill 4 for years, removing the legal barrier that prevented state police from arresting people suspected of crossing the border illegally. The court did not rule on the law's constitutionality. It threw the case out on standing grounds, finding that the three plaintiffs, Las Americas Immigrant Advocacy Center, American Gateways, and El Paso County, had no right to sue in the first place.
The decision marks a significant step forward for a law Texas passed in 2023 in response to what state officials called an invasion of illegal border crossings. Whether SB 4 takes effect immediately remains unclear, but the legal roadblock that kept it dormant is now gone.
Texas Attorney General Ken Paxton celebrated the ruling on social media, as KXAN reported:
"Texas's right to arrest illegals, protect our citizens, and enforce immigration law is fundamental. This is a major win for public safety and law and order."
Senate Bill 4 creates a state misdemeanor for illegally crossing the border into Texas and authorizes state and local law enforcement to arrest anyone suspected of violating it. The law also requires state magistrate judges to order people arrested for illegal entry to leave the country for Mexico, either in lieu of prosecution or upon conviction. Newsmax reported that the law could carry prison sentences of up to 20 years for those who refuse to comply with removal orders.
The Texas Legislature passed the law in direct response to record illegal border crossings that state officials said overwhelmed local communities and resources. Those crossings have since subsided, but the legal and political fight over who gets to enforce immigration law has only intensified.
Immigrants' and civil rights groups challenged SB 4 almost immediately after its passage, arguing that policing immigration falls exclusively under the federal government's authority. The Biden administration joined that fight, calling the law unconstitutional. A lower court agreed and issued an injunction that kept SB 4 from taking effect.
The Trump administration changed the federal government's posture entirely. It dropped the Department of Justice's participation in the lawsuit, removing one of the most powerful legal adversaries the plaintiffs had on their side. That shift left the advocacy groups and El Paso County to carry the challenge on their own, and the Fifth Circuit found they couldn't.
The appeals court's order was explicit: this ruling was about who had the right to bring the case, not whether SB 4 passes constitutional muster. The court wrote that the plaintiffs "voluntarily incurred costs to advocate for clients" and that "under recent Supreme Court precedent, that falls far short of conferring standing." The court vacated the preliminary injunction on that basis alone, consistent with a pattern of Fifth Circuit rulings that have sided with enforcement authority in immigration disputes.
That distinction matters. The underlying constitutional questions, whether a state can create its own immigration crimes, whether state judges can order deportations, remain unanswered by this court. But the practical effect is the same: the injunction is gone, and the law can proceed.
Judge James Ho authored a concurring opinion that went further than the majority's narrow standing ruling. Ho argued that Texas had a right to defend itself and framed mass migration as a strategic threat:
"If our adversaries are going to weaponize mass migration to harm America as well as other countries, our elected officials are entitled to respond accordingly. And in any event, these are political matters for which elected officials are held accountable by voters, not judges."
Ho's concurrence reflects a view gaining traction in conservative legal circles: that the federal government's failure to secure the border creates a vacuum that states are not only permitted but obligated to fill. It's a position that Texas officials have defended both in and out of the courtroom, arguing the state has a sovereign right to protect itself against illegal migration that GOP leaders say amounts to an invasion.
Nicolas Palazzo, director of legal services at Las Americas Immigrant Advocacy Center, accused the Fifth Circuit of ducking the real question. He said the court "took the easy way out" by declining to rule on the merits of SB 4's legality.
Palazzo framed the decision in stark terms, as a threat to border communities:
"By avoiding the core question of S.B. 4's unlawfulness, it left the road wide open for S.B. 4 to continue its reign of fear and targeted profiling against migrants and their families, undermining safety and security in El Paso. We remain committed, however, to continue to challenge S.B. 4 and its abuse of power."
That language, "reign of fear," "targeted profiling," "abuse of power", is familiar rhetoric from advocacy groups that have fought state-level immigration enforcement for years. But the court's 10-7 margin suggests the legal momentum is moving in the other direction. Seven judges dissented, and the law has already survived a trip to the Supreme Court, where justices temporarily allowed SB 4 to take effect while litigation continued.
The ACLU and allied groups have argued that immigration enforcement is exclusively a federal power under the Constitution. Justice Sotomayor, in an earlier stage of the litigation, wrote that Texas passed a law that "directly regulates the entry and removal of noncitizens" and that it "upends the federal state balance of power that has existed for over a century." That argument has found sympathetic ears on the bench, Sotomayor has repeatedly warned that courts are giving government too much enforcement power at citizens' expense, but it has not yet produced a majority willing to strike SB 4 down.
The immediate question is whether SB 4 goes into effect now. The Fifth Circuit's order lifts the injunction, but KXAN reported it was not clear if the law would take effect immediately. Texas officials have defended the law as a necessary tool for border security. Opponents have promised to keep fighting.
The broader legal battle is far from over. The standing ruling means a new plaintiff with clearer legal injury could bring a fresh challenge. And the constitutional questions, federal preemption, the scope of state police power, the authority of state judges to order removal, remain open for future litigation. Courts at every level, including the Eighth Circuit in a separate detention case, have been working through the boundaries of enforcement authority in an era of record illegal immigration.
But for now, the trajectory is clear. The Biden administration challenged SB 4 and lost its partner in the fight when the Trump administration pulled the DOJ out. The advocacy groups that remained couldn't clear the standing threshold. And the Fifth Circuit, the most conservative federal appeals court in the country, showed no interest in keeping the injunction alive.
Texas passed this law because the federal government failed to secure the border. The state said so plainly. The Legislature called it an invasion. Whether or not every legal scholar agrees with that characterization, the people who live along the Texas border understand the reality behind it. They watched record numbers of illegal crossings overwhelm their communities while Washington debated and dithered.
The question of how far law enforcement authority extends will continue to generate litigation. But the Fifth Circuit's message on Friday was narrow and pointed: these particular plaintiffs had no business in court, and the injunction they obtained had no legal legs to stand on.
When the federal government won't do its job, states that step up shouldn't have to wait for permission from advocacy groups to act.
