To be fair, W Bush had teleprompter issues too.
The harsh truth is that there is literally nobody in their 70s that's qualified to lead a country. They are essentially unhirable in the workforce, generally a little awkward, and at least slightly detached from reality.
There, I said it.
hell, even in my 40s I'm conscious that I'm probably only 60% as mentally acute as 10-15 years ago. I'm still young enough to remember the difference, but I suspect that too will fade with time.
"Age is no better, hardly so well, qualified for an instructor as youth, for it has not profited so much as it has lost."
HDT