A federal appeals court dismissed as moot a challenge to President Trump’s use of the Alien Enemies Act in removal proceedings against alleged Tren de Aragua members, leaving the central legal question unresolved while showcasing the court’s split views and potential for the Supreme Court to weigh in later.
The Fifth Circuit said the case was moot after the three Venezuelan plaintiffs were removed from the United States under other immigration authorities, which meant judges avoided ruling on whether invoking the 18th-century statute was lawful. That quiet procedural outcome matters because the Alien Enemies Act has rarely been used in modern times, and its resurrection by the Trump administration raises big constitutional and policy questions. The administration argues the statute fits when organized foreign criminal groups amount to a predatory incursion. Critics worry about stretching an old wartime law to justify broad deportation powers aimed at gangs.
The Alien Enemies Act dates back centuries and had only been called on by presidents in extraordinary moments prior to this dispute, most notably in the mid-20th century. The Trump team framed Tren de Aragua’s cross-border criminal activity as tantamount to an invasion or predatory incursion, which they say falls squarely within the statute’s text and the president’s duty to defend the nation. From a Republican perspective, using every lawful tool to remove dangerous transnational criminals is plainly necessary to protect communities and secure the border. Opponents fear precedent more than the present facts, and that caution drove much of the legal pushback.
The Supreme Court’s earlier involvement complicated matters by temporarily blocking removals under the Alien Enemies Act and sending key questions back down the line without deciding the merits. That left the Fifth Circuit to confront whether, in light of mootness, it should resolve the underlying legal issue or wait for a fully live controversy. With the original detainees gone, several judges urged restraint while a couple signaled support for the president’s authority. The split underscores how lower courts often punt on thorny constitutional claims when the procedural posture allows them to do so.
Advancing American Freedom’s legal analysis captured that mixed result well in the language circulated after the decision. “The Fifth Circuit’s en banc decision in W.M.M. v. Trump represents one step forward, one step sideways for the Trump Administration,” Bryce Poole said, noting that the prior ruling that had struck down the invocation was vacated even as the court avoided a full merits ruling. “Last year, in A.A.R.P. v. Trump, the Supreme Court blocked the removals but declined to decide whether President Trump’s invocation of the Alien Enemies Act was lawful, sending that question back to the Fifth Circuit.”
Poole further cautioned that the legal fight is not over. “It’s a step forward because it vacates the prior ruling that said Trump’s invocation was unlawful, leaving the President’s AEA powers intact,” Poole explained. “It’s a step sideways because the court dodged the merits, so the AEA’s legality remains a live question the Supreme Court will likely decide — probably in a different case like J.A.V. v. Trump, which has a certified class, so mootness won’t apply.” That leaves the administration with a partial win and the promise of a more definitive test down the road.
Two judges wrote concurring opinions that read as clear signals of deference to the executive on national security and border matters. “I agree that this case is moot,” Judge James Ho wrote. “But I also agree with the United States that we should address the merits questions directed to us by the Supreme Court — and affirm the President’s actions under the Alien Enemies Act and the Due Process Clause.” Ho added forceful language around judicial deference to presidential declarations of invasion and the narrower question posed by Tren de Aragua.
Not everyone agreed with that approach, and law scholars voiced strong objections to expanding emergency powers based on presidential assertion. “If the president could create an ‘invasion’ simply by claiming that it exists, it would convert dangerous emergency powers that can only be used in extreme circumstances into blank checks the president can invoke any time he wants” Ilya Somin wrote. “That’s contrary to the text of the AEA (which limits its use to situations where these circumstances actually exist) and to the text and original meaning of the Constitution.” Those concerns will likely animate litigation strategy on both sides going forward.
With all seventeen active Fifth Circuit judges participating and the court declining to substitute new plaintiffs for the removed men, the legal tug-of-war over the Alien Enemies Act remains unresolved at the appellate level. The likely next stop is the Supreme Court in a case that avoids mootness and squarely frames whether the president may deploy an 18th-century statute against modern transnational criminal gangs. For Republicans focused on border security and law-and-order enforcement, the decision keeps an important tool on the table while leaving the final legal limits to be decided by the nation’s highest court.
