. . . it is objected, that the judicial authority is to be regarded as the sole expositor of the Constitution in the last resort; and it may be asked for what reason the declaration by the General Assembly [of Virginia], supposing it to be theoretically true, could be required at the present day, and in so solemn a manner.
On this objection it might he observed, first, that there may be instances of usurped power, which the forms of the Constitution would never draw within the control of the judicial department; secondly, that, if the decision of the judiciary be raised above the authority of the sovereign parties to the Constitution, the decisions of the other departments, not carried by the forms of the Constitution before the judiciary, must be equally authoritative and final with the decisions of that department. But the proper answer to the objection is, that the resolution of the General Assembly relates to those great and extraordinary cases, in which all the forms of the Constitution may prove ineffectual against infractions dangerous to the essential rights of the parties to it. The resolution supposes that dangerous powers, not delegated, may not only be usurped and executed by the other departments, but that the judicial department, also, may exercise or sanction dangerous powers beyond the grant of the Constitution; and, consequently, that the ultimate right of the parties to the Constitution, to judge whether the compact has been dangerously violated, must extend to violations by one delegated authority as well as by another - -by the judiciary as well as by the executive, or the legislature.
However true, therefore, it may be, that the judicial department is, in all questions submitted to it by the forms of the Constitution, to decide in the last resort, this resort must necessarily be deemed the last in relation to the authorities of the other departments of the government; not in relation to the rights of the parties to the constitutional compact, from which the judicial, as well as the other departments, hold their delegated trusts. On any other hypothesis, the delegation of judicial power would annul the authority delegating it; and the concurrence of this department with the others in usurped powers, might subvert forever, and beyond the possible reach of any rightful remedy, the very Constitution which all were instituted to preserve.