Mark my words.
The Moderators will step in as soon as Joe Biden starts drifting off.
They can’t do much about his stuttering or lying but they can intervene when he goes off track or gets confused.
Good thing is Trump thinks on his feet. If he is disciplined and at the top of his game, he'll be fine.
My worry is if Trump goes in, chip on his shoulder, hostile to moderators from the opening moment. He's never done anything like Ramaswammy did in that one debate, but he needs to be the statesman as everyone will be watching. Everyone.