The Trump administration has directed immigration officials to review the cases of refugees admitted under former President Joe Biden, as part of an unprecedented effort to identify potential reasons that would disqualify them from being able to stay in the U.S., an internal federal government memo obtained by CBS News shows.

The memo, dated Nov. 21 and signed by U.S. Citizenship and Immigration Services Director Joseph Edlow, instructs agency officials to investigate the cases of refugees who entered the U.S. over a four-year period, between Jan. 20, 2021, and Feb. 20, 2025.

Edlow directed USCIS officials to review the cases of all refugees admitted during this time period, and to potentially reinterview them. Those investigations and reinterviews, Edlow wrote, would focus on determinin

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