That may be the whole point of this. The Dems don’t want any more debates. So they set up these silly rules to try to get Trump to say no.
More specifically, they can’t have Trump introducing topics to the national discussion that the enemedia has successfully suppressed for years.
For example, can they have Trump repeat this Biden quote (even confirmed by Snopes)?: “Unless we do something about this, my children are going to grow up in a jungle, the jungle being a racial jungle with tensions having built so high that it is going to explode at some point.”
They didn’t run interference for him for this long just to have Trump expose it all; they must shut off his mic.