From NPR.

The Justice Department is now aggressively prioritizing efforts to strip naturalized U.S. citizens of their citizenship in cases where naturalized citizens have committed certain crimes.

The new position is laid out in a memo from the Justice Department to its civil division employees. The crimes could include anything from national security incidents to cases of fraud, according to the memo, which also gives district attorneys wider discretion on when to pursue this tactic.

According to 2023 data, 25 million immigrants are naturalized U.S. citizens.
Denaturalization has existed for decades, and was used widely to deport citizens accused of being communists during the 1950s. Still, some immigration attorneys have expressed concerns over this expanded denaturalization effort, questioning whether it is constitutional, and how the families of naturalized citizens would be impacted.