From these facts, by which Montesquieu was guided, it may clearly be inferred that, in saying "There can be no liberty where the legislative and executive powers are united in the same person, or body of magistrates," or, "if the power of judging be not separated from the legislative and executive powers," he did not mean that these departments ought to have no PARTIAL AGENCY in, or no CONTROL over, the acts of each other. His meaning, as his own words import, and still more conclusively as illustrated by the example in his eye, can amount to no more than this, that where the WHOLE power of one department is exercised by the same hands which possess the WHOLE power of another department, the fundamental principles of a free constitution are subverted. This would have been the case in the constitution examined by him, if the king, who is the sole executive magistrate, had possessed also the complete legislative power, or the supreme administration of justice; or if the entire legislative body had possessed the supreme judiciary, or the supreme executive authority. This, however, is not among the vices of that constitution. The magistrate in whom the whole executive power resides cannot of himself make a law, though he can put a negative on every law; nor administer justice in person, though he has the appointment of those who do administer it. The judges can exercise no executive prerogative, though they are shoots from the executive stock; nor any legislative function, though they may be advised with by the legislative councils. The entire legislature can perform no judiciary act, though by the joint act of two of its branches the judges may be removed from their offices, and though one of its branches is possessed of the judicial power in the last resort. The entire legislature, again, can exercise no executive prerogative, though one of its branches constitutes the supreme executive magistracy, and another, on the impeachment of a third, can try and condemn all the subordinate officers in the executive department.
The reasons on which Montesquieu grounds his maxim are a further demonstration of his meaning. "When the legislative and executive powers are united in the same person or body," says he, "there can be no liberty, because apprehensions may arise lest THE SAME monarch or senate should ENACT tyrannical laws to EXECUTE them in a tyrannical manner."
Again: "Were the power of judging joined with the legislative, the life and liberty of the subject would be exposed to arbitrary control, for THE JUDGE would then be THE LEGISLATOR. Were it joined to the executive power, THE JUDGE might behave with all the violence of AN OPPRESSOR."
Some of these reasons are more fully explained in other passages; but briefly stated as they are here, they sufficiently establish the meaning which we have put on this celebrated maxim of this celebrated author.
If we look into the constitutions of the several States, we find that, notwithstanding the emphatical and, in some instances, the unqualified terms in which this axiom has been laid down, there is not a single instance in which the several departments of power have been kept absolutely separate and distinct. New Hampshire, whose constitution was the last formed, seems to have been fully aware of the impossibility and inexpediency of avoiding any mixture whatever of these departments, and has qualified the doctrine by declaring "that the legislative, executive, and judiciary powers ought to be kept as separate from, and independent of, each other AS THE NATURE OF A FREE GOVERNMENT WILL ADMIT; OR AS IS CONSISTENT WITH THAT CHAIN OF CONNECTION THAT BINDS THE WHOLE FABRIC OF THE CONSTITUTION IN ONE INDISSOLUBLE BOND OF UNITY AND AMITY." Her constitution accordingly mixes these departments in several respects. The Senate, which is a branch of the legislative department, is also a judicial tribunal for the trial of impeachments. The President, who is the head of the executive department, is the presiding member also of the Senate; and, besides an equal vote in all cases, has a casting vote in case of a tie. The executive head is himself eventually elective every year by the legislative department, and his council is every year chosen by and from the members of the same department. Several of the officers of state are also appointed by the legislature. And the members of the judiciary department are appointed by the executive department.
