I'm definitely not counting any eggs before they hatch, but the impression I've gotten for months now is that a dead dog could be competitive against either Trump or Biden. The Dems being the first to tell voters "we heard you and we made adjustments" is the smart play on paper.
And while the timing is not perfect, having this happen a week after the RNC, the assassination attempt, and the Vance VP pick? No one is talking about Trump anymore and the MAGA meltdowns in the past 24 hours show that they do not know what to do campaigning against anyone other than Biden.
I've even heard rumblings that the Vance choice is now being second-guessed in MAGA circles. It's too late to back out, but that was a choice to cater to the base as opposed to persuading swing voters.
I've wondered this for years. Everyone around him is either too much of a freakshow to really persuade a mass audience, or too boring to get the crazies excited.