Which president used slave labor to build his Hermitage residence near Nashville?

Which president served two non-consecutive terms?

Author Washington Irving described which president as "a withered little apple-john?"

Which president served as vice president for his political nemesis?

Which president was described as "so honest that if you turned his soul inside out there would not be a spot on it?"

Which president purchased the land that's now southern Arizona and part of southern New Mexico?