These two conflicts, long segregated in history and memory, were in fact intertwined. They both grew out of the process of establishing an American empire in the West. In 1860, competing visions of expansion transformed the presidential election into a referendum. Members of the Republican Party hearkened back to Jefferson’s dream of an “empire for liberty.” The United States, they said, should move west, leaving slavery behind. This free soil platform stood opposite the splintered Democrats’ insistence that slavery, unfettered by federal regulations, should be allowed to root itself in new soil.