Answer:
53 years
Explanation:
In the 72 years between the presidency of George Washington and that of Abraham Lincoln, the number of years which saw a slaveholder as President is 53 years.
There were ten presidents between this period including George Washington - 8 years, Thomas Jefferson - 8 years, James Madison - 8 years, James Monroe - 8years, Andrew Jackson - 8years, Martin Van Buren - 4years, William Henry Harrison -1month, John Tyler - 4years, James K. Polk -4years, and Zachary Taylor - 1year.
