It might be pretty to think that "The President took an oath to protect this country," but it's not factual or true.
Here's the oath the president took:
"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 have my own copy of the Constitution, thank you.