For more information on antebellum state migration laws, see, "The myth of ‘open borders.’ Even before the U.S. government regulated migration, states did. Here’s why" by Anna O. Law, the Herbert Kurz Chair in Constitutional Rights and associate professor of political science at CUNY Brooklyn College. (September 21, 2021), The Washington Post Heidi Altman, the Director of  Policy at the National Immigrant Justice Center (https://immigrantjustice.org/ ) presents ten points of humane border solutions.  They can be found at:  https://immigrantjustice.org/staff/blog/humane-solutions-work-10-ways-biden-administration-should-reshape-immigration-policy