Surely you are paying attention, then. The Constitution creates a very powerful position that is quite open ended in terms of Might. Nothing in his oath, precludes extra-judicial murder. It is up to him to take the risk. He is the Executive Branch. He has the power, as we see, to ignore law and get away with it.
This oath is word for word, from the Manual. It even contains the word "execute."
“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.”
He has the Rights in the 9th A. He is still a Citizen, above the law, quite actually, though perhaps not technically, but certainly in practice. And he is the C & C, but not subject to UCMJ.
And when you do get caught like Nixon, you just resign. If you won't resign, like Kennedy, well there is extra-judicial murder for that also.
So, allowed by the Constitution to be President to protect it, is decoded to read, protect it by all means necessary.
Remember a President has the power of absolute Pardon. He can pardon himself and all his murderers if it came to that.
So, the RIGHT it murder? Oh yes.