I went back and watched the press conference again to see if I could see the so called mental decline. What is it they say? There is no there there. I thought it was a great press conference.
But the Trump trolls almost certainly did not watch the press conference from start to end. These people are simply parroting the pundits on right wing media where they never carried the entire press conference from start to end, but cut away to push their message and that's what the trolls go on about. They have their own view on reality because they don't give themselves a chance to see reality.
Biden is not the slickest public speaker. But he never has been. Obama spoke in complete, fully punctuated paragraphs. But compared to Trump, or even George W. Bush, Biden is Cicero.