In last year's presidential primary, Bernie Sanders's campaign revealed millions of people willing to vote for a socialist, working-class platform. In the general election, a choice between neoliberal Hillary Clinton and right-wing Donald Trump, it was confirmed that U.S. workers still have no party that will genuinely represent them. What will it take to form a democratic organization rooted in the working class? Posing this question forces us to ask—and answer—several others. Can a party of the working class be built without a larger, more powerful left? What is the relationship between electoral campaigns and left advance? How should the left relate to the Democratic party? A discussion between Jacobin's founding editor Bhaskar Sunkara and Jacobin contributor Paul Heideman.