Joseph McKenna, Petition of the United States in Re Nineteen Barges and Four Towboats…
“ Prohibition is a remedy of exigency and in exclusion of other process of relief. It is directed against unwarranted assumptions of jurisdiction or excesses of it. In some cases there may be instant judgment that such is the situation and the writ granted. In other cases there may be doubt and the writ denied. Ex parte Muir, 254 U.S. 522, 534, 41 Sup. Ct. 185, 65 L. Ed. 383. And doubt in the instant case would seem to be justified, for two District Courts have decided that, under circumstances such as presented in this case, it does not involve or constitute a suit against the United States. ”
