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.

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.

President Donald Trump has halted arrivals of refugees already cleared to enter the United States, according to a memo seen Wednesday, as he quickly pursues a sweeping crackdown on migration.

U.S. border agents have been instructed to summarily deport migrants crossing into the country illegally without allowing them to request legal protection.