The immigration blitz was action long promised by President Donald Trump who made mass deportation central to his campaign.

The campaign aims to educate residents about their rights in the event of being stopped or detained by federal agents with U.S. Immigration and Customs Enforcement, or ICE.

“Don’t open the door, remain silent if you’re arrested, tell your children not to open the door, and don’t sign anything,” Zavala told the crowd, most of whom are members of Arise Chicago, which organizes primarily Polish and Latino immigrant workers in low-wage industries like food production, manufacturing, domestic labor and food service.