I am really not sure if some of his speech troubles can be attributed only to his stutter. I listened to a lot of his speeches and sometimes, it is very unlikely that it would only due to a stutter. For instance he "forgets" where he is or "forgets" peoples names, as media claim, in these cases, you could still explain it as he wanted to avoid a stutter so he did not say it directly (used circumlocution). Given the fact that he is 40+ years in politics, he shouldn't handle those moments like this, so it is just weird. And it is not only that, I am really afraid that he may be experiencing some real cognitive decline, I wish I could be wrong. Even though I don't agree with his politics, I admire him as a person who stutter for what he did (openly talking about it, speech in AIS Gala, recently amazing interview with John Hendrickson from The Atlantic, etc.). What I would wish if his troubles were really caused by his stutter (which I don't think unfortunatelly) that he would admit it, therefore he could make stuttering more normal for us. You know, if a presidential candidate and former vice president stutters and is not ashamed about it, that would give us a lot of confidence gain and overall advertise stuttering and make it more "normal" for general public. That would be nice but I don't think this will happen. We will see.