The Trump administration is taking its third-country deportation policy to the Supreme Court after a federal appeals court in Boston upheld a lower court ruling declaring it unlawful. Attorney General Todd Blanche framed the move as urgent, accusing the appeals court of acting 'in the dark of night' — though the administration had already deported more than 25,000 migrants to at least 29 countries under the contested policy before the courts intervened. The mechanics are worth understanding clearly. Under standard deportation law, the US returns people to their countries of origin. Third-country removal sends them somewhere else entirely — countries with which the deportees have no connection. Mexico absorbs the largest share, but migrants have also been sent to countries across Latin America, Central Asia, the Caribbean, and Africa. Some destinations include the Central African Republic, where militia violence and terrorism are active threats, and South Sudan, which is in the grip of political and economic collapse. The legal challenge is a class-action lawsuit filed by migrants subject to deportation orders. The core question is straightforward: what due-process protections must the government provide before sending someone to a country they've never lived in, have no ties to, and which may be actively dangerous? Two courts have now answered that the current policy provides too few. Blanche's confidence rests on the Supreme Court's earlier intervention in the same case, when it granted a stay that temporarily allowed deportations to continue. The conservative 6-3 majority has shown willingness to defer to executive authority on immigration enforcement, making this the administration's most favorable venue. DHS General Counsel James Percival defended the policy on X, reframing the question as one of public safety: 'What is cruel is allowing criminal illegals who can't be sent home to stay in our communities.' Human rights organizations see it differently. The ACLU has called the campaign 'Machiavellian,' while Amnesty International documented migrants arriving in unfamiliar countries in 'extremely precarious and stressful' conditions. Refugees International and Human Rights First track the deportations through their Third Country Deportation Watch project, which has mapped the scope of agreements with receiving nations. The structural pattern here is cost externalization at scale. The US government reduces its domestic enforcement burden by transferring it — along with the human beings involved — to countries with fewer resources, weaker institutions, and in some cases active conflict. The receiving countries absorb the costs of integration, housing, and security. The deportees bear the existential risk. The political benefit accrues entirely to the administration. Whether the Supreme Court grants emergency relief will signal how far executive authority can stretch on immigration without congressional authorization. The court's previous stay suggests the administration has a plausible path, but the merits question — whether deporting people to countries they have no connection to violates due process — remains unresolved and will likely require full briefing.