Loading…
Three branches, checks and balances, judicial review, and the amendment process
Learn step-by-step with practice exercises built right in.
The Constitution divides federal power among three coequal branches and gives each branch tools to check the others. The goal — articulated by Madison in Federalist 51 — was to prevent any single faction or branch from accumulating tyrannical power: "Ambition must be made to counteract ambition."
| Branch checked | Tool used | By which branch |
|---|---|---|
| Congress passes a law |
Match each constitutional power to the branch that holds it: (a) declare war, (b) command the military, (c) interpret the Constitution, (d) confirm federal judges, (e) issue pardons.
(a) Declare war — Legislative (Congress, Article I, Section 8).
(b) Command the military — Executive (President as Commander-in-Chief, Article II, Section 2).
(c) Interpret the Constitution — Judicial (Supreme Court, established by Marbury v. Madison under Article III).
(d) Confirm federal judges — Legislative (Senate, by majority vote — Article II, Section 2).
(e) Issue pardons — Executive (President, for federal offenses, Article II, Section 2).
Note (a) and (b) together illustrate the deliberate split of war powers between Congress (declare) and President (command).
Review key concepts with our flashcard system
Explore more AP United States Government and Politics topics
| Veto |
| President |
| Veto | Override (2/3 of both houses) | Congress |
| President nominates judges/officials | Confirmation | Senate |
| President negotiates treaties | Ratification (2/3 of Senate) | Senate |
| Federal officials | Impeach (House) and remove (2/3 Senate) | Congress |
| Statutes and executive actions | Judicial review | Courts |
| Court decisions | Constitutional amendment, jurisdiction-stripping, court size | Congress |
| Judges | Nomination | President |
Madison's argument has two layers:
Together these provide a "double security" against tyranny. Madison did not assume virtuous leaders — he designed a system where self-interested ambition in each branch would naturally resist encroachment by others.
Separation of powers is the structural reason the federal government often moves slowly. That is by design — a feature, not a bug — but it can produce gridlock, encourage executive unilateralism, and shift policy battles into the courts.
What vote is required for Congress to override a presidential veto? Where is this rule located in the Constitution?
Congress can override a presidential veto with a two-thirds (2/3) vote in BOTH the House and the Senate. The rule is in Article I, Section 7 (the "Presentment Clause"), which describes how a bill becomes a law and what happens if the President vetoes it. Overrides are rare in practice because mustering 2/3 supermajorities in both chambers requires substantial bipartisan support.
Explain Madison's argument in Federalist 51 that "ambition must be made to counteract ambition." Why did Madison NOT rely on the personal virtue of officeholders to prevent tyranny?
Madison argued that, given human nature, you cannot rely on virtuous leaders to refrain from accumulating power. Instead, government must be DESIGNED so that the self-interest of officeholders works AGAINST tyranny rather than for it. Each branch must be given both the constitutional means AND a personal incentive to resist encroachment by the others — "ambition must be made to counteract ambition."
This is achieved by giving each branch:
Madison famously wrote, "If men were angels, no government would be necessary." Because they are not, government must be structured so that ambition checks ambition. Combined with federalism, this gives the people a "double security" against tyranny — internal separation among federal branches AND vertical separation between federal and state governments.
Describe THREE checks Congress holds over the executive branch and ONE check the judicial branch holds over Congress.
Congressional checks on the executive (any three):
Judicial check on Congress:
Modern presidents increasingly act unilaterally through executive orders, signing statements, and executive agreements when Congress is gridlocked. (a) What constitutional concern does this trend raise? (b) Identify TWO checks that limit this kind of executive unilateralism. (c) Why might Congress find it difficult to use those checks effectively?
(a) Concern: Unilateral executive action shifts lawmaking out of the constitutionally designated legislature and into a single elected official. This risks undermining separation of powers — the President, by design, was not supposed to "make law" but to "take care that the laws be faithfully executed" (Article II, Section 3). Sustained executive unilateralism can drift toward the very concentrated power Madison warned against in Federalist 51.
(b) Two checks:
(c) Why these checks are hard to use:
The result: presidential unilateralism tends to grow over time as Congress's capacity to police it lags behind.