
Amendments to the US Constitution can be ratified by the Legislatures of three-fourths of the several States, or by Conventions in three-fourths thereof. Congress determines which of the two methods the states must use in order to ratify a particular proposed amendment. The first method of ratification requires three-fourths of the state legislatures to ratify an amendment to the Constitution. The second method, ratification through state convention, is the least used method of ratification. Each state holds a convention specifically to consider the amendment.
| Characteristics | Values |
|---|---|
| Who ratifies amendments | Legislatures of three-fourths of the several states or conventions in three-fourths of the states |
| Who decides which method is used | Congress |
| Alternative method | Two-thirds of the state legislatures can request a constitutional convention for proposing amendments |
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What You'll Learn

The two methods of ratification
Ratification by State Legislatures
The traditional constitutional amendment process is described in Article V of the Constitution. Congress must pass a proposed amendment by a two-thirds majority vote in both the Senate and the House of Representatives. The amendment is then sent to the states for ratification by a vote of the state legislatures. An amendment becomes part of the Constitution when it has been ratified by three-fourths (currently 38) of the states. This process has been used for ratification of every amendment to the Constitution thus far.
Ratification through State Convention
Article V also provides for an alternative process, which has never been utilized. If requested by two-thirds of the state legislatures, Congress shall call a constitutional convention for proposing amendments. Ratification through state convention is the least used method of ratification. Each state holds a convention specifically to consider the amendment. Conventions in three-fourths of the states must approve the amendment. This method has been used only once for the ratification of the 21st Amendment, which repealed Prohibition. This flexible option allows states to reflect the will of their constituents directly.
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Ratification by state legislatures
The amendment becomes part of the Constitution when it has been ratified by three-fourths (currently 38) of the states. This process has been used for the ratification of every amendment to the Constitution thus far, with the exception of the Twenty-First Amendment, which repealed Prohibition.
Congress can provide that the states must call conventions for the single purpose of deciding whether to ratify an amendment. This method has been used only once, for the Twenty-First Amendment. Each state holds a convention specifically to consider the amendment, and conventions in three-fourths of the states must approve the amendment. This flexible option allows states to reflect the will of their constituents directly.
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Ratification by state convention
Each state holds a convention specifically to consider the amendment. Conventions in three-fourths of the states must approve the amendment for it to be ratified. This method has only been used once, for the ratification of the 21st Amendment, which repealed Prohibition.
Article V of the Constitution states that "on the Application of two-thirds of the Legislatures of the several States, [Congress] shall call a Convention for proposing amendments". The convention can propose amendments, whether or not Congress approves of them. The proposed amendments are then sent to the states for ratification.
Congress can choose between two ways that the states might ratify an amendment. An amendment can be ratified by the state legislature—the part of the state government that enacts laws for the state. However, Congress can also provide that the states must call conventions for the single purpose of deciding whether to ratify an amendment.
The Supreme Court ensures that the state ratification process is constitutional. The stipulation that an amendment must be ratified by three-fourths of the states guarantees widespread agreement, highlighting the importance and enduring impact of each alteration to the Constitution.
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The role of Congress in ratification
Congress plays a crucial role in the ratification of amendments to the Constitution. According to Article V of the Constitution, Congress must pass a proposed amendment by a two-thirds majority vote in both the Senate and the House of Representatives. Once an amendment is passed by Congress, it is then sent to the states for ratification.
Congress has the power to determine which of two methods the states must use to ratify a particular amendment. The first method, which has been used for every amendment except one (the Twenty-First Amendment), requires ratification by the state legislatures of three-fourths of the states. This process ensures that amendments have widespread support across the country.
The second method, which has only been used once for the ratification of the Twenty-First Amendment, involves each state holding a convention specifically to consider the amendment. This method allows states to reflect the will of their constituents directly. To ratify an amendment using this method, conventions in three-fourths of the states must approve it.
In summary, while the states have the final say in ratifying amendments, Congress plays a vital role in proposing and shaping the ratification process. By choosing the method of ratification, Congress can influence the level of support needed for an amendment to become part of the Constitution.
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The Supreme Court's role in ratification
The Supreme Court ensures that the state ratification process is constitutional. The Court's role in ratification is to ensure that the process is followed correctly and that any amendment has been ratified by three-fourths of the states, guaranteeing widespread agreement and highlighting the importance and enduring impact of each alteration to the Constitution.
The traditional constitutional amendment process is described in Article V of the Constitution. Congress must pass a proposed amendment by a two-thirds majority vote in both the Senate and the House of Representatives. Congress then sends the proposed amendment to the states for ratification by a vote of the state legislatures.
Congress determines which of the two methods the states must use in order to ratify a particular proposed amendment. The first method of ratification requires three-fourths of the state legislatures to ratify an amendment to the Constitution. The second method of ratification is through state convention. Each state holds a convention specifically to consider the amendment. Conventions in three-fourths of the states must approve the amendment for it to be ratified. This method has been used only once for the ratification of the 21st Amendment, which repealed Prohibition.
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Frequently asked questions
Amendments are ratified by the Legislatures of three-fourths of the several States, or by Conventions in three-fourths thereof.
The first method of ratification requires three-fourths of the state legislatures to ratify an amendment to the Constitution.
The second method of ratification is the least used method. Each state holds a convention specifically to consider the amendment. Conventions in three-fourths of the states must approve the amendment.
The second method of ratification has been used only once, for the ratification of the 21st Amendment, which repealed Prohibition.
Congress determines which of the two methods the states must use in order to ratify a particular proposed amendment.

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