The U.S. immigration detention system is spread out across federal facilities, private prisons, state prisons, and county jails. It’s grown under both Democratic and Republican presidents. And it’s been offered up as a source of revenue for over a century, beginning with the first contracts between the federal government and sheriffs along the Canadian border.Guests:Brianna Nofil, assistant professor of history at The College of William and Mary author of The Migrant's Jail: An American History of Mass IncarcerationTo access bonus episodes and listen to Throughline sponsor-free, subscribe to Throughline+ via Apple Podcasts or at plus.npr.org/throughline.Love podcasts? For handpicked recommendations every Friday, subscribe to NPR’s Pod Club here.Learn more about sponsor message choices: podcastchoices.com/adchoicesNPR Privacy Policy

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“What did the council decide on item 42?” — answered with the speaker and the moment.