James Madison:AGE_AT_START_DATE:75 years, 110 days####9 years, 360 days:DURATION_(DAYS):3,647 days####James Madison:DURATION:9 years, 360 days####[TABLECONTEXT]:[TITLE]:List of Presidents of the United States by age####[TABLECONTEXT]:PRESIDENT:James Madison
James Madison started to be the oldest US President at his 75 years, 110 days for a duration of 3,647 days