The Department of Justice filed 40 denaturalisation petitions between late August and early October, which Attorney General Todd Blanche called "the largest denaturalization effort in modern history." The targets span citizens originally from Mexico, Pakistan, China, Sierra Leone and elsewhere, accused of concealing criminal histories — money laundering, child sexual abuse, visa fraud, tax evasion, and in two cases, espionage for China — when they applied for citizenship. Most criminal convictions came after the oath of citizenship, but DOJ argues the underlying conduct predated it, disqualifying the applicants for lacking "good moral character." The legal mechanism is not new. US law permits courts to strip naturalised citizenship when applicants wilfully concealed a "material fact" that would have disqualified them. The tool was used extensively after World War II against individuals who concealed Holocaust involvement or war crimes. The anarchist Emma Goldman was denaturalised and deported to the Soviet Union in 1917. But usage dropped sharply after the Cold War. What is new is the velocity and volume: 40 cases in roughly six weeks represents an operational tempo without modern precedent. The administration frames this as national security housekeeping — removing criminals who lied their way to citizenship. That framing obscures the broader pattern. Trump has publicly floated denaturalising Somali Americans over daycare fraud in Minnesota, writing "Send them back from where they came, Somalia, perhaps the worst, and most corrupt, country on earth." He suggested New York City Mayor Zohran Mamdani, born in Uganda, might be in the country illegally — a false claim. He even floated revoking citizenship from Elon Musk after a personal falling-out. The tool is being normalised against individuals the president personally dislikes. The structural risk is not in the 40 cases themselves — many involve serious alleged crimes. The risk is in the signal the scale sends. Denaturalisation at volume transforms citizenship from a durable legal status into a conditional one, reversible whenever prosecutors can reconstruct a "material fact" argument. Human rights groups warn this trajectory could leave people stateless, particularly those from countries that do not recognise dual citizenship or will not accept returnees. Birthright citizenship remains constitutionally protected — the Supreme Court struck down Trump's first executive order to restrict it in June — but Trump issued a second executive order seeking to narrow how birthright citizenship is applied. The legal battles continue. The two-track strategy is clear: attack naturalised citizenship through DOJ litigation, attack birthright citizenship through executive orders and judicial challenges. Both tracks aim to make American citizenship less permanent and more contingent on executive discretion. The 40 cases will proceed through federal courts, where judges will evaluate each on the merits. Some will likely succeed — concealed espionage is hard to defend. But the institutional precedent matters more than the individual outcomes. A legal tool historically reserved for war criminals and spies is being scaled into a routine enforcement mechanism. The question is not whether these 40 people committed crimes. The question is what happens when the next administration — or this one — files 400.
