BBC radio interviews Dr. S. Jay Olshansky on the age of the presidential candidates and their projected health and longevity.

When the next presidential term begins, the White House will be occupied either by 79-year-old Sanders, 78-year-old Biden, or 74-year-old Trump. What is the probability that any of these candidates will survive for four years, or possibly eight years, with their health intact? Dr. S. Jay Olshansky weighs in on the age of the presidential candidates.

Listen to the interview here starting at 36:30