From Politico:
With all their potential for pitfalls and insta-classic moments, the pair has made the build up to the showdown, to take place here Thursday night at Washington University, feel more like a NASCAR race than a serious political forum: the audience may be tuning in as much in anticipation of cringe-inducing pile-ups as they are to watch the typical parry-and-thrust of debate.
It is absolutely true that Joe Biden has a history of putting his foot, or sometimes his entire leg into his mouth. But the man would have to fall head-first down a flight of stairs on his way to the stage to be able to compete with this: