Joe Biden, 78, will lead an American gerontocracy

Biden, who will be the oldest president in U.S. history, will be governing with Mitch McConnell (Ky.), the top Republican in the Senate, who is exactly nine months older than Biden; and Nancy Pelosi (Calif.), the Democratic speaker of the House, is 23 months older than McConnell. The trio has been in federal office for a combined 114 years.