What "constitutional principle" can be found in both constitutions?

Social contract.

Explanation:

The social contract was a concept originated during the enlightenment era. It gives authority and legitimacy to the States and it explains why people should obey the government's choices. Locke said that by confirming each person to live under a certain type of society, they all accept to surrender certain freedoms and adopt some rights to make life in society able.

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answer: alexander hamilton

explanation: alexander hamilton was george washington's right hand man. he took an early role in the militia as the american revolutionary war began. in 1777, he became a senior aide to general washington in running the new continental army.