I’m no believer in karma, but I found it incredibly telling that the oath was stumbled over, regardless of which side caused it (or interesting that both did in turn, in light of your fascinating post).
Rather than karma, may we call it “divine irony.”
The word stumbled over was “faithfully” and that was very telling.
If they had a redo, does that mean Biden was President for a day and Obama is not #44 but #45?
Just asking...
It was required that the statements be delivered in set form with verbal accuracy and without correction or stammering. He who failed in a syllable failed in everything, said a legal proverb. The point of this was that the religious-minded Anglo-Saxons put great faith in the supernatural, and they felt that if a man was about to swear falsely, God, by whom he swore, would cause him to falter in his speech.
A web source said that the oath had to be recited without mistakes, "without slip or trip." (That's the keyword to use for a web search on this.)
"Divine irony" is a nice way to summarize the whole event.