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