What U.S. President was known as “Father of the Constitution”?

What U.S. President was known as “Father of the Constitution”?
-Benjamin Franklin
-George Washington
-John Hancock
-James Madison

Answer: On this day in 1751, James Madison, who served as the fourth president of the United States, was born on a plantation in Virginia. James Madison is recognized as the “Father of the Constitution” for being instrumental in the drafting of the United States Constitution and as the key champion and author of the United States Bill of Rights. No other delegate was better prepared for the Federal Convention of 1787, and no one contributed more than Madison to shaping the ideas and contours of the document or to explaining its meaning.

James Madison

James Madison Jr. was an American statesman and Founding Father who served as the fourth President of the United States from 1809 to 1817. Wikipedia
Born: 16 March 1751, Belle Grove, Port Conway
Died: 28 June 1836, Montpelier, Montpelier Station, Virginia, Virginia, United States
Full name: James Madison, Jr.
Height: 1.63 m
If men were angels, no government would be necessary.
Knowledge will forever govern ignorance; and a people who mean to be their own governors must arm themselves with the power which knowledge gives.
Ambition must be made to counteract ambition.