86-year-old US congressman explains why he won't retire

The median age of US senators is 64, and 20 members of Congress are over 80 — a phenomenon one legal scholar has dubbed the "old-igarchy." The debate over political gerontocracy has intensified following Donald Trump's 80th birthday, the sudden death of Senator Lindsey Graham and uncertainty over Senator Mitch McConnell's health. An 86-year-old congressman explains why he refuses to stand down.