Stanley Matthews, Clark v. Barnard — Opinion of the Court
“ We are relieved, however, from its consideration by the voluntary appearance of the state in intervening as a claimant of the fund in court. The immunity from suit belonging to a state, which is respected and protected by the constitution within the limits of the judicial power of the United States, is a personal privilege which it may waive at pleasure; so that in a suit, otherwise well brought, in which a state had sufficient interest to entitle it to become a party defendant, its appearance in a court of the United States would be a voluntary submission to its jurisdiction. ”
