The John Williams NewsClick: Immigrants in our sanctuary city?

FILE - In this April 7, 2015, file photo, Chicago Mayor Rahm Emanuel celebrates at Plumbers Local 130 Union Hall in Chicago after winning in a runoff election for a second term in office. Book publisher Alfred A. Knopf announced Tuesday it will publish a book by Emanuel on governing at a time of "historic gridlock." Titled "The Nation City: Why Mayors Run the World," Emanuel's book is scheduled for release in spring 2020. (AP Photo/Nam Y. Huh, File)

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