Donald Trump has called Mexican migrants criminals and rapists, vowed to build a “beautiful” wall along the southern border, and presided over traumatic family separations among asylum seekers. But nativist ideology in U.S. politics — and policy — is nothing new. Immigration scholar Erika Lee walks Will and Siva through America's spotty record as a nation of immigrants, from the Naturalization Act of 1790, which barred nonwhite people from becoming citizens, to the Trump administration's Muslim ban in 2017.