"Looking at the full video, which was live-streamed by WFMY News 2 on YouTube, gives more clarity. If you fast forward to the end of the video, it becomes clear that Biden wasn't shaking hands with thin air. In fact, he was gesturing at the people on the right and eventually behind him who were cheering. He even gestures toward the crowd on the left side of the dais, but it is covered by a mic stand."
I watched it and thought he was gesturing towards the group of people on his right. But I also think he was confused on which way to exit. Not unlike celebrities at the Oscars after their speeches.
I think this is a non issue but the tenacity in which people tried to grab onto it and make it into an issue is frankly sad.
Is Biden suffering from loss of mental function? Quite possibly. He is definitely at an age where that is common. Should we be be concerned? Sure. But should we have been concerned when we had what appeared to be a pathological liar, who may have had full capabilities of his mental faculties, but was borderline illiterate and morally bankrupt at the helm? Sure.
Between those two choices, personally I'm more comfortable with the former. Not even close