Why it matters: The largest number of single-day arrests announced by Immigration and Customs Enforcement since Trump took office last Monday and declared a national emergency on the U.S.-Mexico border is a clear sign that his administration is stepping up efforts crack down on undocumented immigrants.

The Trump administration launched an immigration enforcement blitz in Chicago on Sunday that includes several federal agencies that have been granted additional authorities to arrest undocumented immigrants in the US,

With two top Trump administration officials in Chicago, federal law enforcement began a “targeted” immigration blitz Sunday, according to a spokesman for U.S. Immigration and Customs

CHICAGO — Top Trump administration officials, including “border czar” Tom Homan and the acting deputy attorney general, visited Chicago on Sunday to witness the start of ramped-up immigration enforcement in the nation’s third-largest city as federal agencies touted arrests around the country.

Top Trump administration officials, including “border czar” Tom Homan and the acting deputy attorney general, visited Chicago on Sunday to witness the start of ramped-up immigration enforcement.

The number of arrests was uncertain. Illinois officials, including the governor, said they had not been given advance notice.

Acting U.S. Deputy Attorney General Emil Bove and Border Czar Tom Homan oversaw immigration enforcement efforts in Chicago on Sunday, as efforts got underway across the country.

Acting Deputy Attorney General Emil Bove visited Chicago on Sunday to witness the start of ramped-up immigration enforcementin the nation's third-largest city promised by the Trump administration, though few details of the operation were made public.