The White House has accused "right-wing critics" of selectively editing videos in a "misinformation" campaign to question President Joe Biden’s mental state.
In the most recent incident, Mr Biden’s opponents claimed he experienced a moment of confusion that required Barack Obama to lead him off stage at a weekend fundraiser.
The White House shared other footage that they said showed Mr Biden was just pausing to take in the applause.
The mental acuity of both Mr Biden, 81, and his 78-year-old challenger, Donald Trump, have come under scrutiny as the US election race heats up.
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