Joe Biden needed guidance from an honour guard after appearing confused at a wreath-laying ceremony at Arlington Cemetery on Saturday.
Having laid the wreath, the 80-year-old US President took a few steps to his right, before turning back towards the wreath, where the white-gloved guard pointed him back to the correct spot next to Kamala Harris, the vice president.
It was the most recent in a string of blunders and faux pas that have caused voters to question whether Mr. Biden ought to run for office again.
Early November CNN research indicates that only 25% of US voters believe that Joe Biden has the mental acuity and endurance to serve a second term, while 53% believe the same of Donald Trump.
Earlier in November, the president confidently jogged towards a podium in Philadelphia, before tripping as he climbed the stairs.
Mr Biden tried to make light of the incident by theatrically grabbing the railings.
But the optics of the stiff gait of an ageing president have presented a challenge to the White House.
It decided in 2023 that Mr Biden would use a shorter, sturdier set of stairs to disembark from Air Force One.
This was after a series of stumbles on the occasionally wobbly 18-foot staircase from the plane’s upper door, which presidents have traditionally used.
In June the president tripped over a sandbag and fell during a US Air Force graduation ceremony.
In the same month he pledged to build a railway from “the Pacific all the way across the Indian Ocean”.
And in September 2022, he called out to Jackie Walorski, the Indiana congresswoman, at a White House conference, eight weeks after she was killed in a car crash.
‘Concerns about Biden’s age’
Despite the fact that Mr. Trump, his most likely opponent, is 77 years old, Mr. Biden’s age is becoming one of the main concerns in the presidential race.
Only one Democrat has opposed Mr. Biden’s presidential candidature, and that is 54-year-old Congressman Dean Phillips from Minnesota. This is despite worries about Mr. Biden’s advanced age.
Rivals for the presidential nomination, including Mr. Trump, have begun to doubt his ability to perform the job.
Nikki Haley, who is emerging as the former president’s likeliest challenger, accused him of being confused about who America’s allies were after he spoke positively about the leaders of North Korea and China.
Ron DeSantis’s campaign posted a video of Mr Trump appearing muddled at a New Hampshire rally.
It also highlighted another gaffe where Mr Trump greeted voters in Sioux Falls, South Dakota, during a campaign stop in Sioux City, Iowa.