I agree. It's one thing to poll people's opinions right now, before they are head to head. It's another once the filth starts when things ramp up. It's not unfair to say Biden has had some genuine moments of lack of mental acuity. That should be concerning in as much as it's a line of attack. Also, the sexual assault accusation. Imagine your politics being so gutter bound, that both candidates for President are rapists. Unbelievable!
Still if you choice is the two of them, obviously it's Biden over Trump. Trump is an outright madman bordering on dictator. Imagine how unrestrained a second term for him will be.
Still you'd think they could put forward someone, anyone better? Sanders if obviously better, but if not him, why not someone who can at least do an interview without losing his train of thought in the middle of it. It doesn't mean Biden is totally useless, Reagan was known to be off his gourd towards the end of things, but it is a solid line of attack on him. Why not get someone who can't be so easily attacked as being senile? Trump voters don't care about Trump's madness, it's a cult and nothing but fanatical support is what you can expect from them. But what about the people who are flexible and will decide the election?
Imagine if Biden has a moment during a debate, it will be solid chum to throw in the waters.