Why has James Madison been referred to as the father of the US Constitution?

Answer 1

Madison, wrote the Virginia Plan, the basis for the U.S. Constitution, he wrote 29 of the 85 Federalsit papers, political-advertisement for the Constitution,and he wrote the Bill of Rights, which protects our rights.

Answer 2

He was the chief author of the constitution and the bill of rights.

Madison is called that because he took all the notes for the convention. He wrote down what everyone said and did. Madison wrote the rough draft for the Constitution, and introduced the idea of checks and balances.

Answer 3

He is considered the "Father of the Constitution" because he came up with many ideas for it.