Yeah, there was a moment there when the American gerbilists actually reported the news, but they seem to have reverted to Praetorian Guard status.
They really are a group of sheep, so, in the face of the obvious, someone broke through and everybody followed suit. They all know independently that Biden is senile, but toe the line, safe in the numbers, in their party's interest. And that interest will win out soon enough. Some are already starting to defend him, and it will just grow into business as usual.