All of the current living former presidents (Clinton, Bush, Obama) except for Jimmy Carter are younger than Donald Trump, Bernie Sanders and Joe Biden. A child born in two years of the Bush presidency is old enough to vote in this year’s election.
Why Do Such Elderly People Run America? – The Atlantic
One might expect a typical opponent to seize on these verbal slips by questioning whether Biden, who is 77, is too old to hack it. But his rival Bernie Sanders, who has already suffered a heart attack during this campaign, is a year older. In January 2021, the three people most likely to be the next president—Biden, Sanders, and the incumbent, Donald Trump—would each be the oldest president to ever give an inaugural address in American history.