In the next place, this provision of the bill seems to be unnecessary, as adequate judicial remedies could be adopted to secure the desired end without invading the immunities of legislators, always important to be preserved in the interest of public liberty; without assailing the independence of the judiciary, always essential to the preservation of individual rights; and without impairing the efficiency of ministerial officers, always necessary for the maintenance of public peace and order.  The remedy proposed by this section seems to be in this respect not only anomalous, but unconstitutional; for the Constitution guarantees nothing with certainty if it does not insure to the several States the right of making and executing laws in regard to all matters arising within their jurisdiction, subject only to the restriction that in cases of conflict with the Constitution and constitutional laws of the United States the latter should be held to be the supreme law of the land.

The third section gives the district courts of the United States exclusive “cognizance of all crimes and offenses committed against the provisions of this act,” and concurrent jurisdiction with the circuit courts of the United States of all civil and criminal cases “affecting persons who are denied or can not enforce in the courts or judicial tribunals of the State or locality where they may be any of the rights secured to them by the first section.”  The construction which I have given to the second section is strengthened by this third section, for it makes clear what kind of denial or deprivation of the rights secured by the first section was in contemplation.  It is a denial or deprivation of such rights “in the courts or judicial tribunals of the State.”  It stands, therefore, clear of doubt that the offense and the penalties provided in the second section are intended for the State judge who, in the clear exercise of his functions as a judge, not acting ministerially but judicially, shall decide contrary to this Federal law.  In other words, when a State judge, acting upon a question involving a conflict between a State law and a Federal law, and bound, according to his own judgment and responsibility, to give an impartial decision between the two, comes to the conclusion that the State law is valid and the Federal law is invalid, he must not follow the dictates of his own judgment, at the peril of fine and imprisonment.  The legislative department of the Government of the United States thus takes from the judicial department of the States the sacred and exclusive duty of judicial decision, and converts the State judge into a mere ministerial officer, bound to decide according to the will of Congress.