Biden doesn’t possess the wherewithal or the demeanor to talk over Trump while he’s spewing bullshit.

Harris does. She will interrupt Trump, she will get loud when he tries to interrupt her, and Trump will not have good answers to her questions. If she gets him angry and flustered, he will look like a raving lunatic.

I didn’t think it was a good idea for Biden to drop out, but I’m happy to have been proven wrong about that so far. I think this is an indication that Harris is ready for the debate in a way Biden couldn’t be.