Separation of Powers and Checks and Balances

By the end of this lesson, you will be able to explain the constitutional structure of separated powers, trace the checks each branch has over the others, and evaluate whether the system works as designed.

Why Separate Powers?

Montesquieu's insight: concentrated power is tyranny's engine. If the same person or body makes the law, executes the law, and judges violations of the law, there is no limit on their authority.

Madison in Federalist No. 51: "Ambition must be made to counteract ambition." The Founders did not rely on virtuous leaders — they designed structural incentives so that each branch would resist encroachments by the others.

The Three Branches

Legislative (Congress): makes law; Article I; bicameral (House + Senate); "the first branch" — the Founders expected it to be most powerful.

Executive (President): enforces law; Article II; unitary (one person); Commander in Chief; cabinet.

Judicial (Courts): interprets law; Article III; Supreme Court + lower courts; lifetime appointments.

Checks Each Branch Has

Congress checks the President:

Override presidential vetoes (2/3 majority of both chambers)
Declare war (though presidents have often acted without this)
Senate confirms executive appointments and ratifies treaties (2/3)
Impeach and remove the President (House impeaches; Senate tries)
Control the budget — no money without congressional appropriation
Override executive orders through legislation

President checks Congress:

Veto legislation (or pocket veto)
Call special sessions of Congress
Recommend legislation in the State of the Union
Refuse to enforce laws (controversial)

Congress checks the Courts:

Senate confirms all federal judges
Congress sets the number of Supreme Court justices
Congress can strip the Court's jurisdiction over certain cases (Article III power)
Impeach and remove federal judges
Constitutional amendments can override Court decisions

President checks the Courts:

By the end of this lesson, you will be able to explain the constitutional structure of separated powers, trace the checks each branch has over the others, and evaluate whether the system works as designed.

Why Separate Powers?

Montesquieu's insight: concentrated power is tyranny's engine. If the same person or body makes the law, executes the law, and judges violations of the law, there is no limit on their authority.

The Three Branches

Legislative (Congress): makes law; Article I; bicameral (House + Senate); "the first branch" — the Founders expected it to be most powerful.

Executive (President): enforces law; Article II; unitary (one person); Commander in Chief; cabinet.

Judicial (Courts): interprets law; Article III; Supreme Court + lower courts; lifetime appointments.

Checks Each Branch Has

Congress checks the President:

Override presidential vetoes (2/3 majority of both chambers)
Declare war (though presidents have often acted without this)
Senate confirms executive appointments and ratifies treaties (2/3)
Impeach and remove the President (House impeaches; Senate tries)
Control the budget — no money without congressional appropriation
Override executive orders through legislation

President checks Congress:

Veto legislation (or pocket veto)
Call special sessions of Congress
Recommend legislation in the State of the Union
Refuse to enforce laws (controversial)

Congress checks the Courts:

Senate confirms all federal judges
Congress sets the number of Supreme Court justices
Congress can strip the Court's jurisdiction over certain cases (Article III power)
Impeach and remove federal judges
Constitutional amendments can override Court decisions

President checks the Courts:

Why Separate Powers?

The Three Branches

Checks Each Branch Has

Separation of Powers and Checks and Balances

Why Separate Powers?

The Three Branches

Checks Each Branch Has

The Veto and Override Process

Checks in Practice: Tensions and Failures

Summary