Baruch College professor Thomas J. Main discusses his new book, “,” with Bill Finan, director of the Brookings Institution Press. In the interview and his book, Main describes the alt-right’s ideological roots, how it became a factor in American politics, and why it poses the greatest challenge to democratic liberalism today. Also in this episode, explains the current and potential consequences of President Trump’s tariffs in the latest edition of his Economic Update. Subscribe to Brookings podcasts  or on , send feedback email to , and follow us and tweet us at  on Twitter.  The Brookings Cafeteria is a part of the .