A president could put a bullet through a political rivals head and say he was "to the best of his ability, preserving, protecting, and defending the Consitution of the United States" if that political rival was calling for the "termination of all rules, regulations, and articles, even those found in the Constitution" and was preparing to do it.

I could see the argument being made that yes, that's an official act. You'd have to argue why it's okay for a President to abandon their oath of office.