If his campaign since the switch to Harris was made is any indication, I honestly think this is going to be the worst debate performance of Trump's life. He's up against a prosecutor as a convicted felon, has been found liable for rape, is a serial fraudster, a pathological liar, self-obsessed, and a complete sociopath. He's responsible for overturning Roe v. Wade and just about every credible economist says his economic policies will hurt growth and increase inflation. Harris is far from a perfect candidate, but she's running against somebody who can best be described as an absolutely terrible human being.
arguing in court is very different than debating. Court has rules and a basis for truth. If you ever read trumps depositions you see his behavior is different in a courtroom than in the media.