They'd better hope that hearing aid has good sound quality.
Handler: "President Trump, are you defending your administration's decision to designate an overwhelmingly peaceful protest movement as terrorist?"
Biden: "President Trump, are you adrift in your mission to imprison a delegate and intermingling of jokers moving Minneapolis?"
Trump: "What?"
Biden: "Oh shit, shut up, wait, stop talking."
Moderator: "Uh excuse me, Vice President Biden..."
Biden: "Be quiet! Shit, shit, shit! You're fucking everything up! Just stand there! Don't say anything. Shit! Stop repeating everything I say! Goddamn it! Oh fuck, we are so fucked, send the Secret Service out there! Grab him, say it's a medical problem, whatever, get him off the goddamn stage!"
Drug cocktails can only go so far. He's old, frail and his mind is going, which puts him in a way worse position than Hillary in 2016. She was drug-fueled but at least she still had her mental faculties. If they're mixing uppers and downers they're walking him down a tightrope, the slightest mistake could cause him to go berserk on camera or have a stroke.
Someone with his frail constitution also needs long breaks to recover after getting doped up for an event. Remember when Joe was going to take 10 days off? Then they decided he had to visit Kenosha and he sounded like death and had a big IV bruise on his hand. If he disappears for a drug holiday, Trump needs to hammer the "Where's Joe?" message.