Here’s why Biden is toast: in this situation, any candidate in Biden’s shoes would do a series of events (interviews, press conferences, town halls, etc) to prove they are up to the task.
But, Biden isn’t doing that because he can’t. He’s not capable—and that’s not going to change.
It’s pretty interesting to read Biden’s TIME interview transcript from late May: it reads like someone who’s lost a step or two but is still sharp, engaged, and knowledgeable, albeit combative if not crotchety. (Also, seems he was already sick before his back-to-back D-Day/G7 travel schedule.)
(I did LOL at his line that Putin wanted the Finlandization of NATO, but Biden gave him the NATOization of Finland. Grade A Cold Warrior dad joke there.)
Yeah, age has definitely permanently short-circuited a couple of protective verbal fuses, and he often takes a while to warm up to his point, but “Biden saying crazy shit” has literally been the lede on him in every Presidential race he’s run in since ‘88.