Biden has twice stumbled while climbing airport tarmac staircases while boarding Air Force One, once a few months after taking office in 2021 and again while departing Warsaw earlier this year. Conservative social media users reacted to Thursday's fall immediately with a mix of declarations he is too old for office or jokes about his physical condition.
Former president Donald Trump, 76, already is attempting to make Biden's age a 2024 campaign issue.
Biden is not the first senior U.S. official to take a tumble this year, after Senate Minority Leader Mitch McConnell tripped and fell at a fundraising event in Washington, D.C. The Kentucky Republican, 81, missed several weeks of Senate work after suffering a concussion and injuring his ribs.