Thinking out loud here, after reading an article where Don Lemon is defending his questioning of Bidens health, it occurs to me...maybe Biden is being used as the most extreme example of why we should elect younger presidents in the future. I feel we will start to see much younger candidates show up from the democrats next presidential election and Lemon is framing the narrative pretty well for it, when you consider his target audience.
Hmmm.
I have been saying for more years than you are probably old that Presidents are too old. However the powers that be won't allow it. Not saying it is correct.