Us history before the civil war, the idea of popular sovereignty meant the territory’s status on free or slave state would be decided by the united states congress the president the state judge majority vote by the people living there (state’s legislatures).

D) majority vote by people residing (living in each region or state)

Sovereignty of thr people's rule (i.e. popular), is the principle that the authority of a gov. or state is created and sustained by the consent of its people, through their elected representatives (Rule by the People), who are the source of all political power.

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