Zachary Taylor was the president form 1849 to 1850 so he didn't really finish a term.
41 states
3 years
I think only 1 or 2 years older
8 years in full office
Joe is 20 and Taylor is 19.
47 years
He spent four years in office
He was in office for about 3 1/2 years.
They are in office 2 years. Next election is 2018.
She went for over 8 years
3 years