Also: jogger votes are likely to be "disenfranchised"/otherwise nullified either by murder or arrest. As they are statistically much more likely to kill or be killed (or at the very least imprisoned) between now and Election Day, the DNC feels it is important to harvest their votes ASAP as time is of the essence.
You already know the answer. Biden will continue to act unstable and seed doubt.
Also: jogger votes are likely to be "disenfranchised"/otherwise nullified either by murder or arrest. As they are statistically much more likely to kill or be killed (or at the very least imprisoned) between now and Election Day, the DNC feels it is important to harvest their votes ASAP as time is of the essence.