Joseph P. Bradley, United States ex rel. Dunlap v…
“ If, as the petition suggests, the commissioner of pensions refuses to carry out the decision of his superior officer, there would seem to be prima facie ground for at least calling upon him to show cause why a mandamus should not issue. This was all that the petitioner asked, and this the court refused. As a general rule, when a superior tribunal has rendered a decision binding on an inferior, it becomes the ministerial duty of the latter to obey it and carry it out. So far as respects the matter decided, there is no discretion or exercise of judgment left. ”
