Federal Appeals Court Upholds Limits on 18th-Century Wartime Law for Deportations

In a significant legal setback for the Trump administration, a divided U.S. Court of Appeals for the Fifth Circuit ruled on September 2, 2025, that former President Donald Trump cannot use the 1798 Alien Enemies Act to deport Venezuelan migrants from Texas, Louisiana, and Mississippi. Trump had invoked the law through executive order, asserting a national security threat posed by alleged members of the Venezuelan criminal syndicate, Tren de Aragua, whom his administration designated as a terrorist organization.

The majority opinion, delivered by Judges Leslie Southwick (appointed by President George W. Bush) and Irma Carrillo Ramirez (appointed by President Joe Biden), emphasized that the Alien Enemies Act historically applies only during an actual state of war between the United States and a foreign power. “A country encouraging its residents and citizens to enter this country illegally is not the modern-day equivalent of sending an armed, organized force to occupy, to disrupt, or to otherwise harm the United States,” the judges wrote.

The dissent, authored by Judge Andrew Oldham (appointed by Trump), argued that the judiciary should defer to the president’s determinations regarding foreign affairs and national security, particularly concerning emergent threats and designations of terrorism.

Background: The Alien Enemies Act and Its Modern Controversy

The Alien Enemies Act is a rarely-invoked statute within the Alien and Sedition Acts, first enacted under President John Adams in 1798. While most provisions from those acts have long since expired or been repealed, the Alien Enemies Act remains in force. Historically, it has been used only three times—during the War of 1812 and both World Wars—and always during declared armed conflict against recognized foreign states.

In the contemporary context, Trump’s attempted usage rests on the assertion that foreign criminal organizations, such as Tren de Aragua, pose a comparably grave danger to the U.S. homeland. The administration argued that mass illegal migration—especially organized by foreign criminal gangs—should be construed as a form of “invasion,” warranting extraordinary presidential authority under the act.

However, the court found this claim unsubstantiated and ultimately unconstitutional in peacetime, setting a critical precedent for future administrations who might wish to invoke the same law under similar circumstances.

International Repercussions: Russia’s Reaction and Diplomatic Ramifications

Trump’s approach sparked not only domestic legal challenges but also fueled diplomatic tensions abroad. Russian officials, reacting to Trump’s warnings about “outside conspirators” and the focus on foreign threats, dismissed the administration’s rhetoric as destabilizing and “irresponsible.” Both Moscow and Caracas have criticized the U.S. for framing migration as a national security issue, warning that such narratives could impact wider geopolitical relations and humanitarian cooperation.

Against the backdrop of ongoing U.S.-Russia strains and North and Latin America’s migration crisis, these legal and political disagreements underline the complexity of balancing border enforcement, international law, and diplomatic engagement.

What Legal Experts and Advocates Are Saying

Legal analysts have described the Fifth Circuit’s decision as a landmark check on executive authority in immigration during peacetime. Lee Gelernt, arguing on behalf of the American Civil Liberties Union, commented: “The Trump administration’s use of a wartime statute during peacetime to regulate immigration was rightly shut down by the court. This is a critically important decision reining in the administration’s view that it can simply declare an emergency without any oversight by the courts.”

Conversely, supporters of Trump’s order argue the threat posed by transnational criminal organizations merits a more robust use of presidential powers, especially as gang violence linked to groups like Tren de Aragua has surged along migration routes and in U.S. border communities. However, the ruling reaffirms the principle that extraordinary measures must align with constitutional constraints and the original intent of federal law.

The ruling comes amid an ongoing national debate over how best to manage border security, humanitarian concerns, and America’s international image. According to recent Department of Homeland Security data, encounters at the U.S.-Mexico border surpassed 2 million in fiscal year 2024, with Venezuelan nationals representing a significant share of arrivals after political and economic turmoil in their home country.

What Happens Next: Supreme Court Awaits Final Word

The case is expected to return to the U.S. Supreme Court, which previously ordered a pause on further deportations of Venezuelan migrants under the 1798 law in April 2025. The final outcome could set a far-reaching precedent regarding the scope of presidential authority in immigration enforcement, wartime powers, and the definition of an “invasion.” As the 2024 presidential election cycle intensifies, the decision’s political and humanitarian consequences are likely to remain at the forefront of national discourse.

Any Supreme Court review will test not just the legal boundaries of the Alien Enemies Act, but also the evolving role of the executive branch in shaping America’s migration and security policy amid complex 21st-century threats.

Conclusion

The row over Trump’s attempt to invoke a centuries-old wartime provision marks a major flashpoint at the intersection of immigration, security, and presidential powers. As courts, advocates, and governments worldwide watch the next steps, the outcome will carry weighty implications for future administrations as well as for millions affected by migration policies at home and abroad. For now, the Fifth Circuit ruling stands as a significant check on unilateral executive action absent a declaration of war or overwhelming evidence of an actual invasion.