When abraham lincoln praised government of the people, by the people, for the people what constitutional principal was he referring to?

Popular sovereignty

Explanation:

Popular sovereignty is whereby the authority of a state and its government are created and sustained by the agreement of its people, through their elected representatives who are the source of all political power. Popular sovereignty expresses a concept and does not necessarily reflect or describe a political reality. Benjamin Franklin expressed the concept when he wrote, In free governments, the rulers are the servants and the people their superiors and sovereigns.

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