Has an Article V convention ever been called?

No. All twenty-seven amendments came through congressional proposal followed by state ratification, and convention applications have never reached the required two-thirds threshold.

How do states amend their constitutions?

Common paths include legislative referral to voters, citizen initiatives, and constitutional conventions, and the availability of each varies by state.

Does the President sign a constitutional amendment?

No. A proposed amendment is not ordinary legislation, so it goes from Congress to the states for ratification without a presidential signature or veto.

Constitutional Amendments: How They Happen

The two-step Article V process federally, plus how states amend their own constitutions through legislatures, conventions, and initiatives.

The United States Constitution is intentionally difficult to change. The framers set a high bar so that fundamental rules would not shift with passing majorities, while still leaving a lawful path for reform. Understanding the amendment process explains why some proposals move quickly and others stall for decades, and it helps voters read the questions that appear on state ballots.

Why Amendment Is Hard

Ordinary legislation needs a simple majority in each chamber and a presidential signature. A constitutional amendment needs supermajorities at two separate stages and does not require the President's signature. That design forces broad consensus across regions and branches of government. The difficulty is a feature, not a flaw. It protects minority interests and keeps the document stable, but it also means meritorious proposals can fail for lack of a single state.

Federal Amendment: Article V

Article V provides two stages, proposal and ratification, and two routes for each.

Stage	Route A	Route B
Proposal	Two-thirds vote in both the House and the Senate	Convention called by Congress on the application of two-thirds of the state legislatures
Ratification	Approval by three-fourths of the states, by legislature or convention as Congress chooses	Same three-fourths requirement, with Congress selecting the mode

All twenty-seven amendments to date were proposed by Congress. They were ratified by state legislatures, except the Twenty-First Amendment, which was ratified by state conventions. No amendment has been proposed through the convention route.

The Congressional Proposal Route

A member introduces a joint resolution proposing an amendment. Two-thirds of each chamber must agree. Congress may set a deadline for ratification, often seven years, and chooses whether states ratify through their legislatures or through specially elected conventions. The President does not sign or veto a proposed amendment, because it is not ordinary legislation. Once Congress transmits the proposal, the states act.

The Convention Route

The second proposal method lets states apply to Congress to call a convention. Applications are counted, and when two-thirds of the states have applied on a subject, Congress is expected to call a convention. Important questions remain unsettled because the route has never been used: whether applications must address the same subject, whether states may rescind an application, how delegates would be chosen, and whether a convention could be limited to a single topic. These uncertainties are part of why the route has not been invoked.

Ratification and Its Complications

Ratification requires approval by three-fourths of the states, currently thirty-eight. Congress decides whether state legislatures or state conventions do the ratifying. Several issues recur.

Deadlines: Congress may impose a ratification deadline, and courts have treated reasonable time limits as valid.
Rescission: whether a state may withdraw its ratification before the threshold is reached is debated and has not been definitively resolved.
Certification: the Archivist of the United States certifies ratification once the required number of states have approved.
Proposed but unratified: several amendments have passed Congress but fallen short of ratification, including the Equal Rights Amendment and the District of Columbia Voting Rights Amendment.

State Constitutional Amendments

State constitutions are amended far more often than the federal document. Common mechanisms include:

Legislative referral: the legislature passes a proposed amendment, often by a supermajority, and voters decide at a general election.
Citizen initiative: proponents gather a required number of signatures to place an amendment on the ballot, available in a number of states.
Constitutional convention: several states periodically ask voters whether to hold a convention to revise the constitution.
Commission recommendations: some states route structural changes through a study commission whose proposals go to the legislature or voters.

Procedural rules shape outcomes. Single-subject requirements prevent combining unrelated changes. Geographic distribution rules for signatures ensure support beyond one region. Supermajority requirements for legislative referral raise the threshold above a simple majority. These rules encode each state's theory of how easily its constitution should change. The National Conference of State Legislatures at ncsl.org tracks amendment activity across the states.

The Bill of Rights and the Amendment Record

The first ten amendments, known as the Bill of Rights, were ratified together in 1791, two years after Congress proposed them. Since then, amendments have addressed slavery and citizenship, voting rights, the income tax, direct election of senators, Prohibition and its repeal, presidential term limits, and more. The Twenty-Seventh Amendment shows how long ratification can take: Congress proposed it in 1789, and it was finally ratified in 1992 after a state acted on the original proposal.

Amendment Versus Ordinary Legislation

Not every policy goal requires a constitutional amendment. A statute can often accomplish the same practical result with far lower thresholds, though it remains subject to repeal and to constitutional limits. Amendments are reserved for changes to the structure of government, fundamental rights, or rules that should be insulated from shifting majorities. That is why proposals to amend the Constitution are relatively rare compared with the thousands of bills introduced each Congress.

Judicial Review of Amendments

Courts generally will not review the substance of a ratified amendment, but they may review whether the procedural requirements of Article V or a state constitution were followed. Federal courts have treated the Article V process as the exclusive means of amending the federal Constitution. State courts have sometimes struck down initiatives for procedural defects such as misleading ballot titles or violations of the single-subject rule.

Reading a Proposed Amendment

Ballot summaries are written for brevity and can diverge from the operative text. Before voting, read the full proposal, not just the caption. Pay attention to effective dates, severability clauses, transition rules, and whether the amendment is self-executing or requires later legislation. These details often determine how much the change actually accomplishes. Official texts are available through congress.gov for federal proposals and through each state's secretary of state or legislature for state measures.

Amendments in Context

The amendment process is slow by design, and most proposals never reach ratification. That does not make the effort meaningless. Debates over proposed amendments often shape legislation, public opinion, and state law even when the federal proposal fails. For researchers and voters, the practical takeaway is to read the text, understand the two-stage structure, and check where a proposal currently stands before relying on any summary.

This guide is general information about the constitutional process, not legal advice.