I was rereading my prediction below and something struck me. Is it a coincidence that this is the second presidential election in a row where the Democrats have nominated someone about whose health clear questions exist?
You'll recollect Ms. Clinton falling out of a van in NYC, being basically carried up steps in India, etc. Biden's issues are more mental, he appears to be losing it, getting forgetful, and mixing up his words.
You remember what Ian Fleming wrote about repeat occurrences: "Once is happenstance. Twice is coincidence. The third time it’s enemy action." If not "enemy action," perhaps a shallow bench problem. Or maybe insufficient agreement among party factions, so that only someone as ambiguously bland as Biden can get a majority.