In conversation with Andrew Keen, the American historian Jacob Heilbrunn, outlines the continuous history of the close association of conservative views and the Republican Party in the early to Mid-Twentieth Century. He describes the party's support of strong anti-immigrant racial differences in the 1920s, hostility to the New Deal, support of the anti-Communist campaign of Senator McCarthy in the 1950s, and support of Donald Trump and his isolationist perspectives, now and in the recent past.