The full Fifth U.S. Circuit Court of Appeals on Friday cleared the way for Texas to enforce its Republican-backed law criminalizing illegal entry into the state from Mexico, overturning a lower-court injunction that had kept the measure on ice for more than a year. The 10-7 ruling marks a significant legal victory for Governor Greg Abbott and Attorney General Ken Paxton, who have argued that the state has every right to defend its border when the federal government fails to do so.
The law, known as SB4, makes it a state crime to enter or re-enter Texas from a foreign country without authorization. It empowers state judges to order violators to leave the United States, and imposes prison sentences of up to 20 years on those who refuse to comply. Abbott signed the measure in December 2023, but enforcement has been blocked by federal courts ever since.
That blockade is now lifted. And the ruling exposes a fault line that has defined border politics for years: whether states may act when Washington will not.
SB4's legal journey has been anything but smooth. A federal judge issued a preliminary injunction in February 2024, blocking the law before it could take effect. The Biden administration had challenged SB4 on the grounds that immigration enforcement is the prerogative of the federal government, a position rooted in longstanding preemption doctrine.
The case then reached the U.S. Supreme Court, which briefly allowed the law to take effect. But the Fifth Circuit, within hours, halted it again pending further review. As the Washington Examiner reported, the Supreme Court's temporary green light lasted less than twelve hours before the appeals court reimposed the block and scheduled expedited oral arguments.
In July 2025, a 2-1 panel of the Fifth Circuit upheld the injunction. But Paxton pushed for the full court to reconsider, and on Friday, the en banc panel delivered a decisive reversal.
The pattern is worth noting. In recent months, federal appeals courts have stepped in repeatedly to check lower-court rulings that blocked executive and state action, a trend visible in cases ranging from immigration enforcement to White House construction disputes.
Judge Jerry Smith, a Reagan appointee, wrote the majority opinion. His reasoning focused squarely on standing, the threshold legal question of whether the groups challenging SB4 had the right to sue in the first place. Smith concluded they did not.
The plaintiffs included Las Americas Immigrant Advocacy Center, American Gateways, and El Paso County. Smith wrote that the advocacy groups had voluntarily increased their representation of immigrants adversely affected by the law, and that this self-imposed burden did not create the kind of concrete injury required to challenge SB4 in court. As Newsmax reported, Smith cautioned against letting plaintiffs manufacture standing from generalized grievances.
"When enterprising plaintiffs repackage a generalized grievance as an 'injury,' courts should rightly exercise caution."
That language is pointed. It signals that the majority views these challenges as attempts to weaponize the courts against state policy choices, a concern that conservative legal thinkers have raised for years about progressive litigation strategies.
All but two Republican-appointed judges on the en banc court joined Smith's opinion. The ruling drew seven dissents.
Chief Judge Priscilla Richman, a George W. Bush appointee, led the dissent. She argued that under a controlling 2012 U.S. Supreme Court precedent, federal immigration law preempts SB4. Her objection was blunt.
"Texas cannot enact its own immigration regime."
That 2012 precedent, widely understood to be Arizona v. United States, though the case name is not specified in the ruling's public description, struck down key provisions of Arizona's own attempt to enforce immigration law at the state level. The dissent's position is that SB4 runs into the same constitutional wall.
But the majority sidestepped that merits debate entirely by ruling on standing grounds. If the plaintiffs had no right to bring the case, the court never needed to reach the preemption question. It is a procedural off-ramp, but one with enormous practical consequences. SB4 can now be enforced while any future challenge works its way through the system.
The distinction matters. Courts that have pushed back against lower-court overreach in other high-profile disputes, including the D.C. Circuit's rebuke of Judge Boasberg over Trump deportation flights, have increasingly shown impatience with broad injunctions that freeze government action based on thin standing claims.
Attorney General Ken Paxton wasted no time claiming the win. In a statement, he framed the ruling as a vindication of state sovereignty on the border.
"Texas's right to arrest illegals, protect our citizens, and enforce immigration law is fundamental."
During oral arguments earlier in the case's history, Texas Solicitor General Aaron Nielson argued that the state has a "right to defend itself" amid ongoing illegal border crossings, a framing that resonated with at least some members of the panel. Fifth Circuit Judge Andrew Oldham, a Trump appointee who has previously voted to uphold Texas border policies, questioned the federal government's preemption arguments during the hearing, suggesting the conflict was narrower than opponents claimed.
On the other side, Edna Yang, co-executive director of American Gateways, called the decision a setback but insisted the fight was not over.
"A setback, not the final word, and we remain committed to fighting this dangerous law at every turn."
That language, "dangerous law", reflects the progressive framing that SB4 will lead to racial profiling and civil-rights violations. But the majority opinion did not engage with those claims, and the standing ruling means they remain untested at the appellate level.
One factor that reshaped the legal landscape: the Trump administration dropped the federal government's challenge to SB4 after taking office. That removed the most powerful plaintiff from the case and left the advocacy groups and El Paso County to carry the fight alone. Without the federal government arguing against the law, the standing question became far more vulnerable, and the majority exploited that vulnerability.
The decision also fits a broader pattern of appellate courts reasserting limits on lower-court injunctions that freeze state or federal policy. In separate cases, appeals courts have shut down contempt probes and reversed injunctions on grounds that trial judges overstepped their authority.
For Texas, the immediate effect is clear. State and local law enforcement can now arrest people suspected of crossing the border illegally and bring them before state judges. Those judges can order deportation. Refusal to leave carries the threat of up to twenty years in prison.
Whether the law survives a future challenge on the merits, particularly the preemption question Richman raised, remains an open question. A new plaintiff with clearer standing could refile. The case could eventually return to the Supreme Court.
But for now, SB4 is the law in Texas. And after more than two years of legal limbo, that fact alone reshapes the calculus for anyone considering an illegal crossing into the state.
The appellate trend is hard to miss. Whether the issue is White House construction injunctions or state immigration enforcement, higher courts have grown increasingly skeptical of sweeping lower-court orders that halt government action on the thinnest of procedural threads.
When the federal government refuses to secure the border and then sues the state that tries to do it, the system is broken. Texas just got permission to fix its piece of it.
