The majority of these requests come without a judge's warrant, which some federal judges have ruled violates the U.S. Constitution's Fourth Amendment prohibition on unreasonable searches and seizures.
In New York City and elsewhere, local officials must ignore the requests unless they come with a judge's warrant and the migrant has been convicted of a violent felony. ICE officials must instead arrest the migrant independently, typically at their home or place of work, which they say makes their job more difficult and dangerous.
Trump deported 37,660 people during his first month in office, according to U.S. Department of Homeland Security data, far less than the monthly average of 57,000 removals and returns in the last full year of his predecessor Joe Biden's administration.