Is this too old for the job? Joe Biden claims that having lived a long life makes him a better president. But not many Americans agree.
78 or 81: the age of America’s next leader
Record breakers: Joe Biden and Donald Trump are already the USA's oldest presidents. Glossary
President - In some countries, the leader is called the president.
USA - The United States of America is a country in North America. It has a population of 329 million.
World War Two - A global war that lasted from 1939 to 1945 and included all of the great powers.
Survey - When you ask a group of people questions about what they think about a particular topic.
Wisdom - Being wise, having lots of experience, knowledge and good decision-making skills.
Experience - When you have done something lots of times before and so know what to do.
Expert - Someone who knows a lot about a particular subject.
Skills - The power or ability to perform a task well.
Cameroon - A West African country with a population of over 100 ethnic groups. Its president, Paul Biya, has held power for 40 years.