It’s midmorning in Wheaton, 25 miles west of downtown Chicago.

Cristóbal Cavazos gets a call from a People’s Patrol volunteer at an industrial park near O’Hare International Airport where thousands of undocumented immigrants work in warehouses and manufacturing and food-processing plants.

The volunteer tells Cavazos she’s watching agents who might be from U.S. Immigration and Customs Enforcement, the agency known as ICE.

Cavazos, 46, rushes to his car. He opens the hatch and packs in five-gallon buckets, drumsticks to pound on them, and bullhorns. He invites me to ride along.

Bensenville, the village that includes the industrial park, has been “a hotbed of ICE activity since Trump came in,” he says.

Cavazos leads the People’s Patrol, one of many volunteer rapid-response networks count

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