 All this to say, it's still technically conceivable that Joe Biden, without any support from his own voters or colleagues and without any money from donors, will somehow power through this and power through the dementia and everything else and cobble together something that resembles a presidential run. That campaign would be like watching the Hindenburg in slow motion. And it's not especially likely at this moment, I don't think. But the possibility is there, at least for now.