Immigration is a federal function.  Current federal immigration policy would deport a woman with no criminal record who has been working in the US for many years, even though she is a mother of young children who are US citizens by birth.  In a word, US immigration policy is inhumane.  County governments cannot change federal immigration policy, but they can refuse to implement the detestable aspects of it.  Kudos to Harry Kim.  He understands the philosophy of community policing and the partnerships required between the police and the community that are threatened by the detainers used by the federal Immigration and Customs Enforcement agency.  The Trump executive order threatens to disrupt our communities, and the counties should not be parties to it.