I would be surprised if FDR was the first President to add “...so help me God.” But since it isn’t in the oaths contained in the text of the Constitution, I’m surprised it has been inserted into other oaths.
On the other hand, how many people would be willing to bet that the Constitution guarantees everyone “a jury of his peers”?
willing to bet that the Constitution guarantees everyone a jury of his peers?
Right, ever one knows it’s “a jury of his peeps...”.