* George Mason: A delegate to the Constitutional Convention from Virginia, Mason refused to sign the final document because he believed it did not adequately protect individual rights. He went on to become a fierce critic of the Constitution and helped to write the Virginia Declaration of Rights.
* Elbridge Gerry: A delegate to the Constitutional Convention from Massachusetts, Gerry was another opponent of the Constitution who believed it gave too much power to the federal government. He is best known for his role in creating the gerrymander, a political district that is drawn in a way that favors one political party over another.
* Richard Henry Lee: A delegate to the Constitutional Convention from Virginia, Lee was initially in favor of the Constitution but eventually changed his mind and became a vocal critic. He argued that the Constitution did not adequately protect the interests of the states and that it would eventually lead to a centralized government.
* Samuel Adams: A prominent leader of the American Revolution, Adams was also a vocal critic of the Constitution. He argued that it gave the federal government too much power and that it did not adequately protect individual rights.