Trump’s immigration policy has closed America’s doors and could change the way Americans think about citizenship and belonging. The Opinion columnists Carlos Lozada and Lydia Polgreen talk about the reporting that took her to countries all over the world to better understand what America’s future might look like.

Thoughts? Email us at theopinions@nytimes.com.

This episode of “The Opinions” was produced by Derek Arthur, Vishakha Darbha and Jillian Weinberger. It was edited by Alison Bruzek and Kaari Pitkin. Mixing by Pat McCusker. Original music by Carole Sabouraud and Pat McCusker. Fact-checking by Mary Marge Locker and Kate Sinclair. Audience strategy by Shannon Busta and Kristina Samulewski. The director of Opinion Audio is Annie-Rose Strasser.

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