Joe Biden's scratchy voice at the start of the debate sparks questions

From the moment that the historic debate between and began, viewers instantly reacted to the sound of Biden's scratchy voice and him repeatedly clearing his throat.

Biden's demeanor sparked alarm even after the president spent a week at Camp David to rest up and prepare for the debate.

'I have a bad feeling about how the debate is beginning,' wrote Nicholas Kristof on social media. 'Trump is speaking nonsense on many topics, but he's projecting energy; Biden is more substantive but in voice and manner is playing into the Trump narrative that he's old for this job.'

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