The official state of emergency is not expected to end this year because of a rise in new infections caused by the coronavirus’s Delta variant. But the determination means that whenever it does end, the department’s hands will be tied.

That leaves two options if those prisoners are not to be sent back into cells: Either Congress could enact a law to expand the Justice Department’s authority to keep them at home beyond the emergency, or President Biden could use his clemency powers to commute their sentences to home confinement.

The Biden team is said to be wary of a blanket, mass commutation, however, both because it would represent an extraordinary intervention in the normal functioning of the judicial system and it could create political risks if any recipient who would otherwise be locked up commits a serious crime. Another option is case-by-case assessment for commutations, but the volume of work required to individually evaluate so many people is daunting.