Original: James Madison , Jr. ( March 16 , 1751 â '' June 28 , 1836 ) was an American politician and political philosopher who served as the fourth President of the United States ( 1809 â '' 1817 ) and is considered one of the Founding Fathers of the United States .
Simplified: James Madison ( March 16 , 1751 â '' June 28 , 1836 ) was the fourth President of the United States .