This is not necessarily a slam-dunk. Trump's blowhard approach works well in some instances but with Biden he comes off as ranting with no specific facts and handwaving. His debate in 2020 with Biden looked to me like a stalemate between two haters but most of the mainstream dubbed it a loss for Trump and a win for Biden.

Secondly, the moderator (such as Chris Wallace four years ago) can tilt things heavily against Trump.

My assumption is that the thieving lying Democrats are busy planning background factors to diminish Trump's optics or to use the debate as an opportunity to discredit him.