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.
Article 2, Section 1 of the Constitution requires that before presidents can assume their duties they must take the oath of office. The completion of this thirty-five-word oath ends one president's term and begins the next.
There is no such thing as a consensual presidency. I will admit though, Trump presidency might appear consensual because of his best ability to carry out the office. His best ability really doesn't measure up, now does it?