Yes, there's someone occupying the office, but he's clueless and is even more out of his depth than George W. Bush, who had at least had some experience in government. The man occupying the office occasionally does things when instructed. Fortunately, there are a few adults around who have had real jobs and performed them professionally, like General Mattis, the Secretary of Defense, and Rex Tillerson, the Secretary of State. Even the Vice-President, the otherwise morally abhorrent Mike Pence, actually governed a state, and got in trouble because of his bigotry, not because of sheer incompetence. The interesting thing is that it turns out the country, and the vast federal bureaucracy, can chug along despite not having a President. For how long though? I guess we're going to find out.