“He and his staff might not know this, but he is done,” said Jim Manley, the Clinton surrogate and Democratic strategist. “He had one last chance to expand his base tonight [more] than he did in the last two debates, but he is dead man walking.”
While Clinton supporters gave Trump credit for appearing more poised and disciplined — particularly during the first 30 minutes — they argue he didn’t do himself any favors as the debate carried on.

“As usual, he dissembled after 30 minutes,” one former Clinton aide concluded.

And that was before Trump refused to say he would accept the election’s results, a moment that quickly became the dominant news from the debate.

“Wheels off the wagon,” the former aide said. “Trump’s unsuitability was clear.”