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 and Customs Enforcement document that became public Friday.

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.

Blanca Figueroa and Severiano Martinez have known from the start of their eight-year marriage that she was at risk of deportation because she entered the United States illegally.

The far-reaching move empowers federal immigration agencies to target a population of migrants who came to the U.S. with the government's permission.