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 administration wants to increase the number of arrests from a few hundred per day to at least 1,200 to 1,500, increasing the chances that non-criminals will be detained.

White House says migrant deportation flights with military aircraft have begun Four local community groups – Brighton Park Neighborhood Council, Organized Communities Against Deportation, Illinois Coalition for Immigrant and Refugee Rights and Raise the Floor Alliance – are all behind the lawsuit.