In his programmatic piece in Jacobin, Bhaskar Sunkara describes the shape of contemporary Left Unity: “the convergence of American socialists committed to non-sectarian organization under the auspices of an overarching democratic structure.” It would be glib to just dismiss this out of hand – alongside increased exposure of the Left in the mainstream media, such a structure could be a good sign. But the way this strategy is being pursued leaves many fundamental questions unanswered.