Which delegate was called the "father of the constitution"?

Thomas Jefferson was the father of the Constitution

James Madison. He is hailed as the "Father of the Constitution" for his pivotal role in drafting and promoting the United States Constitution and the United States Bill of Rights. He also co-wrote The Federalist Papers, co-founded the Democratic-Republican Party, and served as the fifth United States Secretary of State from 1801 to 1809.

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