Trump is losing, don't debate him
The Trump wants to use his debating skills to convince more of his base about that the stop the steal thing is valid. But you may be aware that the synchs before Trump ever ran for office were about the power of grifters to find a base to use against whom they are grifting. (See My family dealing with the con man) I have found that someone that is not COMPLETELY AWARE OF A CONMAN'S TACTIC should not attempt to even debate them because their intention is not about truth, but rather to con their way using their base of people that have resentments against those they hate so as to make any interaction into an opportunity to grift.
OK, here is the news about what Trump wants to do.
Trump Seeks Televised Debate to Push False Claim 2020 Election Was ‘Rigged and Stolen’
Trump is losing in the fight to prove "Stop the Steal" and at this point he knows he needs to grift heavily in order to keep his "Big Lie" alive which is what he is needing. I would tell him this and also not give him the opportunity to use his "training" in manipulation to cast more doubt. The best thing is not to debate him but let the process which is in place by the SPIRIT use his own words against him as he is a liar and a thief.
In other words his intent for the debate is the very reason I would not debate him as the truth is being uncovered on it's own and his reasons for debating is only to cast more doubt using his "grifting gift" to paint a false picture.