I do solemnly swear (or affirm) that I will faithfully execute the Office of President of the United States, and will to the best of my ability, preserve, protect and defend the Constitution of the United States.
I mean, the word "support" doesn't appear there, although it's a stretch to say that "Preserve, protect, and defend" doesn't imply "support" also.
Exactly. Just because the Founding Fathers decided to play around with the Thesaurus, doesn't mean the president should be able to attempt to coup his own country and then run again the very next election