Since January 2025, the Trump administration has transformed the federal custody system for unaccompanied migrant children from a child-welfare pipeline into a holding operation. Average detention has stretched from 44 days (the 2015-2024 norm) to over six months, with more than 1,800 children warehoused in federal facilities. Officials across agencies are coordinating to strip legal protections, defund representation contracts, and accelerate deportation orders — often against children appearing in immigration court alone, without counsel, facing judges and prosecutors who all work for the same executive branch. The legal countermove is elegant in its simplicity: habeas corpus. A growing coalition of roughly a hundred legal organizations, law firms, and solo practitioners — organized under the Children's Due Process Project, co-managed by Loyola University Chicago's Immigration and Human Rights Clinic, the National Center for Youth Law, the Acacia Center for Justice, and The Door — is filing petitions in federal courts demanding the government justify each child's continued detention. The Acacia Center tracked just 33 such petitions filed for unaccompanied children in all the years before 2024. Since January 2025, at least 72 have been filed across 16 federal district courts. The success rate is the story's sharpest number: 98% of resolved cases end with the child released. In many instances, the government capitulates before the hearing even occurs. The dynamic is structurally revealing — the administration appears to calculate that releasing a child is less costly than having a federal judge interrogate the legal basis for holding them. This suggests the policy's foundation is weaker than its enforcement posture implies. The human mechanics are brutal. Two siblings, ages nine and thirteen, spent roughly six months in transitional foster care 200 miles from their mother in Rhode Island. Their mother had passed full federal security vetting within a month of their arrival, moved to a larger apartment, built bunk beds. The government portal glitched; a government employee ghosted her; officials suggested the children might be a safety threat. Hours before a habeas hearing — where an official would have had to defend this decision in open court — the children were suddenly cleared for release. The administration's broader strategy includes ending a federal contract that funded attorneys for over 20,000 unaccompanied children and floating a plan to have HHS attorneys represent the children instead — meaning the judge, the prosecutor, and the child's own lawyer would all be executive branch employees. Democratic senators flagged this in a letter to HHS Secretary Robert F. Kennedy Jr. calling it "unacceptable." Meanwhile, Stephen Miller is leading a sweeping push to accelerate removal of migrant children. The habeas tactic works precisely because it shifts the venue from immigration courts — which are executive branch operations — to Article III federal courts with independent judges. Immigration judges work for the administration. Federal judges do not. The constitutional question is stark: can the government hold children for months, separated from vetted family members, without articulating a lawful justification? Judges across 16 jurisdictions are consistently answering no. The structural picture is one of a government apparatus optimized for throughput — deportation volume — encountering a constitutional bottleneck it cannot easily remove. The habeas strategy does not change policy; it forces the policy to survive judicial scrutiny one child at a time. The 98% release rate is less a legal victory than a diagnostic: it reveals that prolonged child detention, in case after case, cannot be defended on the merits.