The amount of ageism in this thread is disgusting. Biden has a life long stuttering problem that he has to work at to prevent. I've talked with stutters before and sometime it can take them several minutes to just complete a sentence. Speaking problems does not mean a person is not sharp mentally. Both George H.W. Bush and George W. Bush had huge speaking problems. George W. Bush even joked that he mangled the English language.
Finally, I'm willing to bet if I put each and everyone of you under the spotlight for speaking or debating and recorded everything you said for days, weeks and months on end, we would see the same gaffes. I'm sure many of you would have a dear in the headlights look if we shoved you in front the world media to speak to millions of people.
Joe Biden is just fine, and the gotcha youtube videos are irrelevant and prove nothing.
Joe Biden is your next President, and will likely be in office until January 2029.
Remember that 10% of the U.S. Senate is older than Joe Biden and Donald Trump is chronologically just 4 years younger, but his real age is likely 10 years older than Biden given that he is obese and unable to run, while Biden can run, do push ups, and is normal weight.