A memo appears to allow Immigration and Customs Enforcement officials to target programs that let in more than a million people.

The acting head of the Department of Homeland Security (DHS) is allowing immigration enforcement agents to swiftly deport those who came to the U.S. under multiple pathways established under the Biden administration.

The Trump administration is powering ahead with efforts to ramp up immigration enforcement, opening up the possibility of targeting migrants who entered through Biden-era programs and invoking an obscure immigration statute to make it easier to deputize state and local law enforcement to arrest and detain immigrants in the U.

Immigration officials would have authority to quickly expel migrants temporarily admitted via the CBP One App and a separate program for certain people fleeing Cuba, Haiti, Nicaragua and Venezuela.