Among the many, many books I am sure that the Congresswoman has not read, she might wish to consult The Federalist Papers, specifically Federalist 47:
The accumulation of all powers, legislative, executive, and judiciary, in the same hands, whether of one, a few, or many, and whether hereditary, selfappointed, or elective, may justly be pronounced the very definition of tyranny. Were the federal Constitution, therefore, really chargeable with the accumulation of power, or with a mixture of powers, having a dangerous tendency to such an accumulation, no further arguments would be necessary to inspire a universal reprobation of the system. I persuade myself, however, that it will be made apparent to every one, that the charge cannot be supported, and that the maxim on which it relies has been totally misconceived and misapplied. In order to form correct ideas on this important subject, it will be proper to investigate the sense in which the preservation of liberty requires that the three great departments of power should be separate and distinct. The oracle who is always consulted and cited on this subject is the celebrated Montesquieu. If he be not the author of this invaluable precept in the science of politics, he has the merit at least of displaying and recommending it most effectually to the attention of mankind. Let us endeavor, in the first place, to ascertain his meaning on this point. The British Constitution was to Montesquieu what Homer has been to the didactic writers on epic poetry. As the latter have considered the work of the immortal bard as the perfect model from which the principles and rules of the epic art were to be drawn, and by which all similar works were to be judged, so this great political critic appears to have viewed the Constitution of England as the standard, or to use his own expression, as the mirror of political liberty; and to have delivered, in the form of elementary truths, the several characteristic principles of that particular system. That we may be sure, then, not to mistake his meaning in this case, let us recur to the source from which the maxim was drawn.
On the slightest view of the British Constitution, we must perceive that the legislative, executive, and judiciary departments are by no means totally separate and distinct from each other. The executive magistrate forms an integral part of the legislative authority. He alone has the prerogative of making treaties with foreign sovereigns, which, when made, have, under certain limitations, the force of legislative acts. All the members of the judiciary department are appointed by him, can be removed by him on the address of the two Houses of Parliament, and form, when he pleases to consult them, one of his constitutional councils. One branch of the legislative department forms also a great constitutional council to the executive chief, as, on another hand, it is the sole depositary of judicial power in cases of impeachment, and is invested with the supreme appellate jurisdiction in all other cases. The judges, again, are so far connected with the legislative department as often to attend and participate in its deliberations, though not admitted to a legislative vote. 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 she is really interested in the heritage of the concept of three branches of government, another book that she has not read that she might want to look at is the book referenced by Madison, Montesquieu’s Spirit of the Laws:
In every government there are three sorts of power: the legislative; the executive in respect to things dependent on the law of nations; and the executive in regard to matters that depend on the civil law.
By virtue of the first, the prince or magistrate enacts temporary or perpetual laws, and amends or abrogates those that have been already enacted. By the second, he makes peace or war, sends or receives embassies, establishes the public security, and provides against invasions. By the third, he punishes criminals, or determines the disputes that arise between individuals. The latter we shall call the judiciary power, and the other, simply, the executive power of the state.
When the legislative and executive powers are united in the same person, or in the same body of magistrates, 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, there is no liberty if the judiciary power be not separated from the legislative and executive. Were it joined with the legislative, the life and liberty of the subject would be exposed to arbitrary control; for the judge would be then the legislator. Were it joined to the executive power, the judge might behave with violence and oppression.
There would be an end of every thing, were the same man, or the same body, whether of the nobles or of the people, to exercise those three powers, that of enacting laws, that of executing the public resolutions, and of trying the causes of individuals.
The executive power ought to be in the hands of a monarch, because this branch of government, having need of dispatch, is better administered by one than by many: on the other hand, whatever depends on the legislative power, is oftentimes better regulated by many than by a single person.
But, if there were no monarch, and the executive power should be committed to a certain number of persons, selected from the legislative body, there would be an end of liberty, by reason the two powers would be united; as the same persons would sometimes possess, and would be always able to possess, a share in both.
Montesquieu, Spirit of the Laws, Book XI, Chapter 6