Supreme Court Weighs Due Process Limits on Prolonged Immigration Detention

The federal government's authority to lock a person in a cell typically requires a judge to find that the individual poses a flight risk or a danger to the public. For noncitizens navigating the immigration system, that condition has not applied. Under federal statute, Immigration and Customs Enforcement (ICE) routinely holds individuals for months or years without a bond hearing, relying on mandatory detention provisions. Now, the U.S. Supreme Court is evaluating whether that bypass violates the Fifth Amendment's guarantee of due process.[3]

The justices' review follows a September 10, 2026, decision by the U.S. Court of Appeals for the Fourth Circuit, which struck down the Trump administration's interpretation of the detention statute. The appellate panel ruled that denying a bond hearing after six months of confinement crosses a constitutional line. The Fourth Circuit became the ninth federal appellate court to reject the government's no-bond dragnet, creating a near-unanimous consensus among lower courts that the Supreme Court must now address.[2][5]

At the center of the dispute is Section 236(c) of the Immigration and Nationality Act, which mandates detention for noncitizens with certain criminal convictions while their removal proceedings are pending. Because immigration courts face a backlog of more than 3 million cases, these proceedings often stretch beyond a year. During that time, detainees have no mechanism to argue before an immigration judge that they are safe to release.[4]

In the Fourth Circuit case, the government argued that Congress explicitly stripped courts of the jurisdiction to grant bond to this class of noncitizens. The appellate judges disagreed, ruling that statutory mandates cannot override the Constitution. "Prolonged detention without a localized determination of risk fundamentally offends due process," the court wrote, establishing a six-month threshold for a custody hearing.[2]

Civil liberties organizations immediately framed the appellate victory as a necessary check on executive power. The American Civil Liberties Union, which has litigated similar challenges across multiple circuits, stated that the ruling prevents the executive branch from operating a parallel penal system devoid of judicial oversight. "The Constitution does not permit the government to lock people up and throw away the key just because they are navigating an immigration case," the ACLU noted in a September 10 release.[1]

The legal battle has drawn intervention from state governments that bear the downstream costs of federal detention policies. On September 8, California Attorney General Rob Bonta led a coalition of states in filing an amicus brief with the Supreme Court. Bonta argued that prolonged detention destabilizes communities and deprives state economies of taxpaying residents, urging the justices to recognize that due process rights attach to anyone physically present in the United States.[6]

Federal immigration authorities maintain that mandatory detention is the only reliable mechanism to ensure that noncitizens with criminal records actually appear for their deportation hearings. The Department of Justice has consistently argued that requiring individualized bond hearings for thousands of detainees would overwhelm the already strained immigration court system and result in the release of individuals whom Congress explicitly intended to detain.[2][3]

The American Immigration Council, in a brief filed on September 9, quantified the human toll, noting that the average length of detention for individuals challenging their removal exceeds 200 days, with some held for over three years. If the Supreme Court sides with the government, ICE will retain the unilateral authority to maintain these detentions indefinitely. If the justices uphold the lower courts, the federal government will be forced to justify the continued incarceration of thousands of individuals before a judge, shifting the burden of proof back to the state.[3][4][5]