I'm leery of the mention of the President without establishing anything else about the position. Either remove references to the Presidency from the section or establish what the Presidency would entail first.
Nay, but open to the idea
The nature of the development process makes that a little hard. We don't want to simply establish the whole thing in one shot, so it's necessary to work through the things one at a time. When we get to the article of the presidency that will be when we establish that. I am open to your suggestions regarding that article.
True; I'm just looking for a brief statement regarding what the President is before he gets mentioned elsewhere, not a full Article describing the position.
Also, it's bad form to mention a position in the Constitution before it is established in the Constitution, although not doing so would probably be tough.