Joe's only real problem is being a gaffe machine, but if this were at all a fair and balanced world, that wouldn't be a factor at all this time. Joe at his worst couldn't compete with the horrible idiotic untruthful shit that Trump says or tweets seventy, eighty times a day.
Unfortunately, there's a huuuuuge double standard. A Democrat isn't allowed to say anything even mildly wrong, while Trump could probably toss out the n-word and the c-word and his followers would shrug it off as being of no consequence. The dude's told over 10,000 verifiable lies and all you get if you mention that to a reich-winger is "Oh yeah, well, Obama said 'If you like your doctor you can keep your doctor!'" (Which wasn't even really a lie so much as a mistake, in a few isolated cases).
Trump gaffe-gallops so hard that he's just worn the public out until he's held to no standard at all. It's just expected of him. He's like having a dog that just won't stop shitting, so nobody even smacks it with a newspaper to tries to put it out anymore, they just live in a house full of crap and shrug and say, "Eh, Rover shits, it's what he does, what can ya do?" But another dog comes in, takes one dump, and everybody's like, "Oh my god, that's awful! Why don't you train that dog? Look what he did! Yeah, I know, Rover never stops doing it, but that's Rover, he's not trainable, he doesn't even sleep, he just craps, so forget about him, look at the terrible thing that other dog did!"
Really, Biden should have just about carte blanche to mis-speak his ass off... but, he won't.
It's hard to believe that only a few years ago Mitt Romney blew up his whole campaign by one comment about "the 47%," while Trump gets a pass for Nazis-are-very-fine-people, Putin-says-he-didn't-do-it-so-what-can-ya-do?, bleeding-from-her-wherever, grab-'em-by-the-pussy, they're-bringing-drugs-they're-rapists, look-at-her-face-ugh, knock-the-crap-out-of-'em, laziness-is-a-trait-in-blacks, etc. But, Trump's managed to degenerate society THAT far, THAT fast. Just goes to show ya, never get in the way of a sociopath...