A press release the Department of Homeland Security issued on Jan. 21 issued notes the Trump-Vance administration has ended “the broad abuse of humanitarian parole” for undocumented migrants. Immigration and Customs Enforcement and CBP agents can also make arrests in schools, churches, and other so-called “sensitive” areas.

In more than 21 actions, Trump has moved to overhaul parts of the US immigration system, including how migrants are processed and deported from the US. The White House has since publicised some of these efforts.

President Trump began his immigration crackdown with a flurry of executive orders. Immigration experts say they lay out how he hopes to transform enforcement at the southern U.S. border and beyond.

Ron Vitiello, senior advisor to U.S. Customs and Border Protection, joins 'Fox & Friends' to discuss the nationwide immigration crackdown under the new Trump administration.

Tom Homan, President Trump’s “border czar”, and Emil Bove, the acting deputy attorney-general, travelled to Chicago to oversee efforts there. Mr Homan described Sunday’s operation in the midwestern city as a “gamechanger”,

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