You can remove Obama from the White House, if he is there. You can refer to that as removing him from the Oval Office—a physical location. But you cannot remove him from the Constitutional Office of President of United States if, de jure, he is not POTUS.
de ju·re (d jr, d yr)
adv. & adj.
According to law; by right.
According to law, he does not qualify, and by right, he has no standing. Therefore De jure, is not something he is qualified as, IF, he is found to be ineligible...
We will see.