Mr Trump has a mandate to deport illegal immigrants. In their zeal to fill quotas and live out their macho “destroy the flood” culture, ICE agents have revelled in the wanton use of force. And when ICE agents stop or arrest people without cause and search their houses without a court warrant, they are denying their Fourth Amendment rights. Illegal migrants are spread across America and Mr Trump asserts that Democrats deploy them as voters. An early test, due as this was published, was withholding funds from homeland security unless Mr Trump agrees to reform ICE.