I'm sad to have to say it, but from the point of view of many American viewers, Biden is losing. It's not got anything to do with the words that either of them are saying -- it's all how they appear and sound.
Anybody remember the Nixon/Kennedy debate? People who heard it on the radio mostly thought that Nixon won -- because they heard the words. People who watched it on TV were certain Kennedy won, because he wasn't sweating the way that Nixon was.
We're human. Most of us (I guess) don't much care what people are saying. We respond mostly to visual cues. If you look strong,
you must be strong. If your voice is strong, you must be strong -- even if you're telling the most obvious lies and nonsense.