I suspect 99%+ already has their minds made up, and that debate changed no one's vote. This election will come down to how successful the Dems are at cheating.
There was a Minnesota Senate election a few cycles ago. The R won, but it was close. There was a recount. It ended up in Court. The Dem then magically won (again, this was Minnesota). There was actual fraud on the Dem side but the R did not challenge those votes in a timely fashion because he felt he had enough margin. If he had made the challenge, he would have won because the bad votes were overt. But since he did not, by the time the case made it to appeal, it was too late, the Court would not consider his "new evidence," even though it was incontrovertible. I think the entire process took 8 or 9 months. Later, the D turned out to be a creepy, abuser of women and resigned in shame.
There is a lesson here for Trump. Challenge everything, even where you won. Put the time and money into making a strong record of everything, all sufficient enough to stand up on appeal. It's worth it. History shows you must box these people in from all sides. They are very slippery.