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.

Top Trump administration officials 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.

Targeted immigration enforcement operations by multiple agencies were launched in Chicago Sunday, with top Trump administration officials in the city to oversee it all. One of President Trump's many campaign slogans was,