Federalist No. 66 continues Alexander Hamilton’s defense of the Senate as the constitutional court for federal impeachment trials. Building directly on Federalist No. 65, Hamilton answers four major objections: that impeachment trials improperly mix legislative and judicial power, give the Senate too much influence, make senators biased toward officials they helped appoint, and allow senators to judge misconduct connected to treaties they approved.
This paper matters because Hamilton tests each objection against the Constitution’s broader system of checks and balances. He does not argue that the Senate is perfect. He argues that impeachment authority must be placed somewhere, and that dividing the power between the House and Senate provides the strongest practical protection against faction, persecution, and abuse.
1. Separation of powers does not require total isolation
“a partial intermixture of those departments for special purposes”
Hamilton rejects the idea that the legislative, executive, and judicial branches can never share or overlap in any responsibility. Limited mixtures of authority may be necessary for the constitutional system to function.
2. Some overlap is necessary for mutual defense
“necessary to the mutual defense of the several members of the government against each other.”
Checks and balances require the branches to possess ways of resisting one another. Complete separation would leave each branch without adequate defenses against encroachment.
3. Impeachment is a legislative check upon executive abuse
“an essential check in the hands of that body upon the encroachments of the executive.”
Hamilton treats impeachment as one of the legislature’s strongest protections against misconduct by executive officials.
4. The House accuses and the Senate judges
“assigning to one the right of accusing, to the other the right of judging”
This division is central to the constitutional process. The House decides whether charges should be brought, while the Senate decides whether those charges justify conviction.
5. The same people should not be both prosecutors and judges
“avoids the inconvenience of making the same persons both accusers and judges”
Hamilton argues that dividing the process between two chambers creates greater fairness than allowing one political body to control the entire proceeding.
6. Dividing impeachment power restrains faction
“guards against the danger of persecution”
A temporary majority in one chamber cannot both accuse and convict an official on its own. The need to persuade a separate body creates an additional barrier against politically motivated removal.
7. Conviction requires broad Senate agreement
“the concurrence of two thirds of the Senate”
The two-thirds requirement makes conviction difficult. A bare partisan majority cannot remove an official without gaining support beyond its narrowest political base.
8. Constitutional powers should be judged individually
“examine each power by itself”
Hamilton rejects vague claims that the Senate simply has too much influence. Each authority should be considered according to where it can be exercised with the greatest benefit and least danger.
9. Fear of Senate power is not enough by itself
“the hypothetical dread of the too great weight of the Senate”
Hamilton wants evidence and comparison, not generalized suspicion. The mere possibility that an institution might become influential does not prove that a particular power has been misplaced.
10. The House possesses powerful constitutional counterweights
“several important counterpoises”
The Senate’s powers do not exist in isolation. The House has substantial powers of its own that help preserve balance between the two chambers.
11. The House alone begins impeachments
“the sole right of instituting impeachments”
Hamilton considers this a direct counterbalance to the Senate’s power to conduct the trial. Neither chamber can complete the process without the other.
12. The House may also decide presidential elections
“the umpire in all elections of the President”
When no presidential candidate receives an Electoral College majority, the House chooses the President. Hamilton considers that contingent power an enormous source of influence.
13. Senators do not personally choose executive nominees
“It will be the office of the President to NOMINATE”
Hamilton answers the claim that senators will protect officials they helped appoint by emphasizing that the initial choice belongs to the President.
14. The Senate may only approve or reject
“they can only ratify or reject the choice of the President.”
The Senate cannot install its own preferred candidate through the confirmation process. Its role is to accept or refuse the person nominated by the President.
15. Confirmation does not create permanent loyalty
“the appearances of merit might inspire, and the proofs of the want of it destroy.”
Senators may approve a nominee because that person appears qualified. Later evidence of corruption or incompetence can eliminate whatever favorable opinion originally existed.
16. The treaty objection appears stronger than the others
“greater show of reason than any other”
Hamilton acknowledges that concerns about senators judging misconduct connected to treaties deserve serious consideration. He does not dismiss the objection casually.
17. The Constitution relies on joint responsibility in treaty-making
“The JOINT AGENCY of the Chief Magistrate… and of two thirds”
The President and a supermajority of the Senate must cooperate before a treaty can be made. Hamilton argues that requiring so many participants makes betrayal more difficult.
18. The character and number of decision-makers provide protection
“the numbers and characters of those who are to make them.”
The Constitution’s primary defense against corrupt treaties is not the threat of prosecuting an entire political body. It is the careful selection of officials and the difficulty of coordinating widespread corruption.
19. Individual officials may still be punished
“the punishment of the Executive”
Hamilton distinguishes between collective political decisions and personal misconduct. A President who violates instructions or corruptly conducts negotiations may still face impeachment.
20. Corrupt Senate leaders may also be held responsible
“a few leading individuals in the Senate”
Hamilton allows that senators who act as agents of foreign corruption may be individually accused and punished when evidence supports the charge.
21. Entire legislative majorities cannot normally be prosecuted for their votes
“acts done in a collective capacity”
Hamilton argues that lawmakers must generally remain free from punishment for decisions made through the legislative process. Otherwise, independent deliberation would become impossible.
22. Public protection depends on choosing proper officials
“confide the trust to proper hands”
The constitutional system cannot depend entirely on punishment after the damage is done. Citizens and state legislatures must select officials capable of exercising public power responsibly.
23. Institutions should make betrayal difficult
“make it as difficult as possible for them to combine in any interest opposite to that of the public good.”
This is Hamilton’s broader constitutional principle. Government cannot eliminate corruption, but it can divide authority and require enough cooperation to make conspiracy harder.
24. Institutional pride can sometimes reinforce accountability
“count upon their pride, if not upon their virtue.”
Hamilton ends with a sharp observation about human nature. Even senators lacking extraordinary virtue may punish an executive official who deceived them because they will want to defend their authority and reputation.
Why Federalist No. 66 Works for Highlights
Federalist No. 66 works especially well as a highlights page because Hamilton organizes the paper around four specific objections and answers each one directly:
the Senate’s impeachment role does not violate separation of powers because limited overlap is necessary for checks and balances
the Senate’s authority is balanced by important powers belonging exclusively to the House
senators do not personally choose executive officers and therefore are not automatically loyal to every official they confirm
and the treaty process relies on divided authority and broad agreement rather than the unrealistic possibility of prosecuting an entire legislative majority
The paper also clarifies why the House and Senate receive different roles in impeachment. The House accuses, the Senate judges, and conviction requires a two-thirds vote. That arrangement does not remove politics from the process, but it prevents one temporary majority from controlling every stage.
Hamilton’s reasoning is practical throughout. He does not search for a flawless institution. Instead, he asks where each power can be placed with the greatest advantage and the least danger. Federalist No. 66 therefore reinforces one of the Constitution’s central ideas: liberty is protected not by trusting one body completely, but by dividing responsibility among institutions capable of checking one another.
Strong Meme and Quote Candidates
Meme Candidate 1
“The House accuses. The Senate judges.”
Dividing impeachment power prevents one body from controlling the entire process.
Meme Candidate 2
Separation of powers does not mean the branches never touch.
Checks and balances require limited overlap.
Meme Candidate 3
A bare majority can impeach. A two-thirds Senate vote is required to convict.
Meme Candidate 4
Constitutional powers should be judged one at a time—not condemned through vague fear.
Meme Candidate 5
The President nominates. The Senate may approve or reject.
Confirmation is not personal ownership of an official.
Meme Candidate 6
The Constitution cannot make corruption impossible.
It can make corrupt cooperation far more difficult.
Meme Candidate 7
Public safety depends partly on placing public trust in proper hands.
Meme Candidate 8
Hamilton believed institutional pride could restrain misconduct even when personal virtue failed.
Related Links
- Federalist No. 66 Full Text
- Federalist No. 65 Highlights
- Federalist No. 67 Full Text
- Alexander Hamilton
- United States Constitution
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Explore the key ideas and quotations from Federalist No. 66, where Alexander Hamilton answers objections to the Senate’s role in impeachment trials.