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.

Border czar Tom Homan told NBC News that several people with criminal convictions were apprehended in Chicago.

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

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,

A top Department of Justice official and President Trump’s “border czar” were in Chicago overseeing “immigration enforcement efforts,” according to officials. “The DEA, along with our

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 Enforcement. The agency did not say how many arrests have taken place so far.

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.