Treaties

In AP Gov, treaties are formal, legally binding agreements between the U.S. and other nations that the president negotiates as a formal foreign policy power (Article II) and the Senate must ratify by a two-thirds vote, making treaty-making a textbook example of checks and balances in Unit 2.

Verified for the 2027 AP US Government examLast updated June 2026

What are Treaties?

A treaty is a formal agreement between two or more sovereign nations that's legally binding under international law. For AP Gov, the part that matters isn't international law. It's the process. The Constitution splits treaty power between two branches. The president negotiates and signs treaties as one of the formal foreign policy powers of the office (CED 2.4.A lists treaties right alongside commander-in-chief). But a treaty has zero legal force until the Senate ratifies it with a two-thirds vote.

That two-thirds requirement is steep, and it's the whole point. The framers didn't want one person binding the country to foreign obligations alone, so they built in the Senate's advice and consent as a check. Notice it's only the Senate, not the House. That's a deliberate structural difference between the chambers (the House gets revenue bills; the Senate gets treaties and confirmations). When a president wants to avoid that uphill Senate fight, they often use an executive agreement instead, which is an informal power that needs no Senate vote but doesn't bind future presidents the same way.

Why Treaties matter in AP Gov

Treaties live in Unit 2: Interactions Among Branches of Government, and they show up across multiple topics. Under 2.4.A, treaties are listed as a formal foreign policy power of the president, contrasted with executive agreements as an informal one. Under 2.5.A, Senate ratification is one of the clearest checks on presidential power, the kind of executive-legislative tension that topic is built around. And under 2.2.A, the Senate-only treaty power is a prime example of how the two chambers' powers differ by design and how that shapes policymaking. If an FRQ asks you to explain a check on the president, or to distinguish formal from informal powers, treaties are one of the cleanest answers you can give.

How Treaties connect across the course

Executive Agreement (Unit 2)

An executive agreement is the president's workaround for the treaty process. It's an informal power, needs no Senate vote, and accomplishes similar foreign policy goals. The trade-off is durability, since a treaty ratified by the Senate carries more lasting legal weight while an executive agreement can be undone by the next president.

Advice and Consent (Unit 2)

Treaty ratification is one half of the Senate's advice and consent role; confirming presidential appointments (Cabinet members, ambassadors, federal judges) is the other. Both give the Senate, and only the Senate, leverage over the president's agenda, which is exactly the dynamic Topic 2.5 tests.

Structures and Powers of Congress (Unit 2)

Treaties are Exhibit A for the chambers being different by design. Revenue bills must start in the House, but treaty ratification belongs to the Senate alone. The framers gave the smaller, longer-termed chamber the foreign policy check on purpose.

Foreign Policy Powers of the President (Unit 2)

The CED sorts the president's foreign policy tools into formal powers written in Article II (commander-in-chief, treaties) and informal powers built from practice (executive agreements). Knowing which bucket each tool goes in is a classic MCQ move.

Are Treaties on the AP Gov exam?

Treaties almost always get tested through the checks-and-balances lens. Expect MCQs asking how the Senate's advice and consent power affects policymaking compared to the House, or asking you to classify the president's powers as formal versus informal (treaties are formal; executive agreements are informal). On FRQs, treaties work as evidence in a Concept Application or Argument Essay about presidential power and congressional checks. The move you need to make every time is naming both halves of the process: the president negotiates, the Senate ratifies with a two-thirds vote. Saying "the president makes treaties" without the Senate's role will cost you, because the check IS the testable content.

Treaties vs Executive Agreement

Both are deals the president makes with foreign nations, but the process and staying power differ. A treaty is a formal power requiring Senate ratification by a two-thirds vote, and it's legally binding on future administrations. An executive agreement is an informal power, skips the Senate entirely, and can be reversed by the next president. If an exam question mentions a two-thirds Senate vote, it's a treaty; if it mentions the president acting alone, it's an executive agreement.

Key things to remember about Treaties

  • Treaties are formal, legally binding agreements between sovereign nations, and the Constitution makes them a shared power between the president and the Senate.

  • The president negotiates treaties as a formal foreign policy power under Article II, but the Senate must ratify them with a two-thirds vote.

  • Only the Senate ratifies treaties, never the House, which is a key example of how the two chambers' powers differ by design (CED 2.2.A).

  • Presidents often use executive agreements instead of treaties to avoid the Senate, trading durability for speed since executive agreements don't bind future presidents.

  • Treaty ratification is a classic check on presidential power, so use it as evidence whenever an FRQ asks how Congress constrains the executive.

Frequently asked questions about Treaties

What is a treaty in AP Gov?

A treaty is a formal, legally binding agreement between the U.S. and one or more foreign nations. The president negotiates it as a formal foreign policy power, and the Senate must ratify it with a two-thirds vote before it takes effect.

Does the House of Representatives vote on treaties?

No. Treaty ratification belongs to the Senate alone, requiring a two-thirds vote. The House has no formal role, which is one of the structural differences between the chambers the CED expects you to know (the House's exclusive power is originating revenue bills).

What's the difference between a treaty and an executive agreement?

A treaty is a formal power requiring Senate ratification by a two-thirds vote and is binding on future administrations. An executive agreement is an informal power the president uses alone, with no Senate vote, and the next president can reverse it.

Can the president make a treaty without the Senate?

No. A treaty has no legal force until the Senate ratifies it with a two-thirds vote. A president who wants to skip the Senate can use an executive agreement instead, but that's a different, less durable tool.

Is treaty power a formal or informal presidential power?

Formal. The CED (2.4.A) lists treaties and commander-in-chief as formal foreign policy powers because they come from Article II, while executive agreements are the informal counterpart. Classifying powers this way is a common MCQ task.