Why a Wisconsin Judge Was Arrested by the F.B.I.

F.B.I. agents arrested a Milwaukee judge on Friday on charges of obstructing immigration agents, saying she steered an undocumented immigrant through a side door in her courtroom while the agents waited to arrest him in a public hallway. Devlin Barrett, a New York Times reporter covering the Justice Department and the F.B.I., explains how the case fits into the Trump administration’s battles with local authorities over deportations.