More than a million migrants who were allowed to enter the United States during the Biden administration can have their temporary stays revoked and be rapidly deported, according to an Immigration

Those who followed Biden-era guidelines are dismayed that the rules have changed. The app that helped them enter the country now may make them targets.

The U.S. Department of Homeland Security memo provides guidance for the use of a fast-track deportation process that the Trump administration reinstated earlier this week, suggesting officers focus on migrants who failed to request asylum within a one-year deadline after arriving in the U.