A major citizenship crackdown is underway in the United States as the Trump administration targets naturalized Americans accused of concealing serious criminal histories. In court filings across the country, the Justice Department has asked judges to revoke the citizenship of 17 individuals, alleging they obtained naturalization through fraud or by withholding information about past crimes. The cases involve convictions ranging from sexual offences to child exploitation, placing renewed focus on one of the most aggressive denaturalization efforts pursued by the federal government in recent years. The U.S. Department of Justice (DOJ) announced on June 8 that it has asked federal courts across the country to revoke the U.S. citizenship of more than a dozen individuals who either pleaded guilty to or were convicted of criminal offences.