The Justice Department is aggressively prioritizing efforts to strip some Americans of their U.S. citizenship.

Department leadership is directing its attorneys to prioritize denaturalization in cases involving naturalized citizens who commit certain crimes — and giving district attorneys wider discretion on when to pursue this tactic, according to a June 11 memo published online. The move is aimed at U.S. citizens who were not born in the country; according to data from 2023, close to 25 million immigrants were naturalized citizens.

The focus on denaturalization is just the latest step by the Trump administration to reshape the nation’s immigration system across all levels of government, turning it into a major focus across multiple federal agencies. That has come with redefining who is let into the United States or has the right to be an American. Since his return to office, the president has sought to end birthright citizenship and scale back refugee programs.