The general thinking seems to be that she will , at some point, have some kind of mental or physical meltdown under the pressure but it’s best to be prepared that none of will happen.
Her biggest problem is and always has been her provable Marxist political beliefs and history of her and her husband’s corruption.
Donald has been hammering this home at his rallies and I think he will do the same at this debate but in a more presidential manner.
She, on the other hand, will HAVE to attack Donald and his policies but this time she will not evoke a grimace, anger or cynical smile from Trump but a brief, steady, confident gaze in her direction and then calmly destroy her with well known facts.
I believe if she wins, Kaine will be president within a year. A no-win situation.