On the campaign trail, Donald Trump promised to deport millions of “illegal immigrants.” As he prepares to return to the White House, it’s time to figure out how that would work—and who it would include.Guest: Molly O'Toole, reporter covering immigration and security.Want more What Next? Join Slate Plus to unlock full, ad-free access to What Next and all your other favorite Slate podcasts. You can subscribe directly from the What Next show page on Apple Podcasts and Spotify. Or, visit slate.com/whatnextplus to get access wherever you listen.Podcast production by Elena Schwartz, Paige Osburn, Anna Phillips, Madeline Ducharme and Rob Gunther. Learn more about your ad choices. Visit megaphone.fm/adchoices