My father died from Alzheimer's and Biden could be his twin. The confused looks, the outbursts, the stuttering, the changing directions mid-sentence or just branching off into meandering stories of his childhood. I thought it was just me but even my mother mentioned something the other day when she saw Biden on TV and said, "You ever look at him? He looks just like your father did before he died - he has that same empty look in his eyes."
The thing is, people who haven't been around alzheimer's sufferers, there's all kinds of shades of gray. Not all Alzheimer's patients are a confused mess of thinking they're in WW2, and can't remember who their family is. A lot are, but not all. My father could pass for just a normal elderly person. He'd have a normal conversation with you and then go to fill his glass with juice and pour it next to the glass instead and all over the table. Or have a regular conversation with family and know who everyone is and yet when my girlfriend showed him a photo of me I'd texted her, he'd insist it was a photo of him instead. Or even during holidays during dinner with my mother and me and my girlfriend, he'd address me and my mother normally and yet my girlfriend, who I've been with for 16 years (and is Asian), he wouldn't be able to remember her name at all so he'd just call her Suzy Wong while talking to my mother and me as if nothing's wrong.
That's how my father was when the Alzheimer's finally did him in. He wasn't a jumbling, confused mess. He was OK half the time and then not OK the other half. That's why I tell people that Biden is probably a lot sicker than they realize. For example, Biden can throw a quick-witted nasty comment out in response to a reporter's question and yet not be able to figure out how to put a pen in his damn coat pocket. That kind of shit is exactly how my father was.
The thing is, the dems are probably stressed because they have to keep Biden alive at least 2 years. If I remember correctly if he dies before the halfway mark of his administration, then it counts as Kamala's first term. If he dies after the midway mark, then it's seen as Kamala finishing off Biden's first term and so she can run twice - for a total of 10 years - which is a Dem's wet dream.