Federal agents had just sped away from a working-class residential block in Chicago’s East Side neighborhood when a white-shirted Chicago police officer took a deep breath, ducked under a running garden hose and stayed there for several moments. Tear gas still hung in the air and residents were still collecting themselves.

The officer scrubbed at his damp face. He was one of several supervisors who had stood to the side as a crowd of angry neighbors gathered around Border Patrol agents who crashed a car at the intersection of 105th Street and Avenue N.

When people started to throw things, agents filled the block with riot control gas and drove off, leaving disoriented neighbors and police behind.

Chicago police have found themselves in a curious position as the Trump administration’s

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