At the center of the case is a constitutional question with broad implications for immigration policy. The Court will decide whether prolonged detention eventually reaches a point where the Constitution requires the government to provide detainees with an opportunity to seek release.
The legal challenge stems from a Department of Homeland Security policy adopted in July 2025. Under that policy, certain individuals who entered or remained in the United States illegally—including some who have lived in the country for years—could remain in immigration detention without access to a bond hearing.
Before addressing that constitutional issue, however, the justices must first determine whether the case should even proceed. According to SCOTUSblog, they will consider whether the lawsuit has become moot because the individual who originally filed the challenge was released from custody in 2022.
If the Court decides the dispute is still legally alive, its ruling could define the constitutional limits of prolonged immigration detention while providing important guidance on a major immigration policy implemented during the Trump administration.
The Court’s first day back on Oct. 5 will also feature a major climate lawsuit that could affect similar litigation nationwide.
The justices will hear Suncor Energy (U.S.A.) Inc. v. County Commissioners of Boulder County, a case brought after Boulder, Colorado, sued Suncor Energy and ExxonMobil, claiming greenhouse gas emissions contributed to climate change and caused local damages.
During earlier proceedings, a member of Boulder’s legal team described the lawsuit as functioning as “an indirect carbon tax.”
The Supreme Court will now examine whether federal law overrides state-law claims seeking compensation for injuries allegedly caused by interstate and international greenhouse gas emissions.
Another key issue is whether lawsuits of this nature belong in federal court instead of state court. That jurisdictional fight has become one of the central legal questions surrounding climate litigation filed by states and local governments against energy companies.
Also scheduled for Oct. 5 is Johnson v. United States Congress, a case involving veterans’ benefits and the authority of federal courts.
The dispute asks whether federal district courts have jurisdiction to hear constitutional challenges involving benefits administered by the Department of Veterans Affairs or whether those claims must continue through the specialized review process established by Congress.
A decision could clarify where veterans may pursue constitutional claims and determine whether district courts have a larger role in reviewing disputes involving VA benefits.
Two days later, on Oct. 7, the justices will turn to another environmental dispute in Department of the Air Force v. Prutehi Guahan.
That case centers on military operations in Guam and asks whether an environmental organization can challenge the Air Force’s application to renew a permit allowing the disposal of unexploded military ordnance before Guam’s Environmental Protection Agency has ruled on the request.
The Court will also decide whether the Air Force was required to prepare and submit an environmental impact statement to Guam before filing its permit application, an issue that could shape future disputes involving federal agencies and environmental regulations.
Together, the opening cases reveal the wide range of constitutional and statutory questions awaiting the Court this fall. From immigration detention and environmental regulation to veterans’ rights and federal jurisdiction, the justices will confront disputes carrying significant legal, political, and policy consequences.
Although the Court has yet to hear arguments or issue opinions, the October calendar already highlights several cases that could establish important precedents for lower courts and federal agencies. With decisions expected months later, the opening weeks of the new term are likely to draw close attention from lawmakers, advocacy groups, and Americans following the direction of the Supreme Court.
