Popular sovereignty requires that "those who make laws do so with the approval of the citizens."
Popular sovereignty was the political principle that the general population who lived in an area ought to decide for themselves the idea of their administration. In U.S. history, it was connected especially to the possibility that pioneers of government regional terrains ought to choose the terms under which they would join the Union, fundamentally connected to the status as free or slave. The principal defender of the idea was Senator Lewis Cass of Michigan, who put the thought forward while contradicting the Wilmot Proviso in 1846.