He has a stutter, which is a physical issue that he has always had, not a mental one. It requires him to rethink sentences that he has already begun saying beca

He has a stutter, which is a physical issue that he has always had, not a mental one. It requires him to rethink sentences that he has already begun saying because it's impossible to know which words will trigger the stutter. IMO his ability to do that shows the he is mentally acute, not that he isn't. Not sure if you've ever realized halfway through a sentence that you can't say the next word, but it's not an easy situation to be in. His ability to overcome that physical disability is inspiring and imo a makes him a much better politician, even if it leads to struggles.