The piece relies on primary sources such as the National Archives transcription of the Constitution and the Constitution Annotated from the Library of Congress, and it highlights legal analyses that describe unresolved questions about a state-called convention.
Short answer: Can the U.S. Constitution be changed?
Quick take, new us constitution
Yes. Article V of the Constitution provides the legal authority to amend the document, so a change is legally possible and has a defined process, not an ad hoc path; readers can check the original text to confirm this.
The formal framework allows two methods to propose amendments and two methods to ratify them, and practical outcomes depend on broad, sustained support across states and Congress, with timelines that have ranged from months to centuries in past cases, so the process is not typically quick or unilateral National Archives primary text for Article V.
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For a concise view of the constitutional text and official explanation, review the National Archives transcription of the Constitution and the Library of Congress Constitution Annotated.
Where to read the text
The National Archives hosts the founding documents, including the Constitution, which contains Article V describing the amendment process; this is the primary source for legal authority on changes to the Constitution National Archives primary text for Article V and readers can also read the US Constitution online or see the Constitution Center text Article V at Constitution Center.
Article V explained: the constitutional text and what it permits
Exact Article V text
Article V states the rules for amending the Constitution and is the explicit constitutional basis for the amendment process; it identifies the two formal proposal routes and the two ratification options that together define how the Constitution can be changed Constitution Annotated explanation of Article V.
What the text authorizes Congress and the states to do
In plain language, Article V authorizes either Congress to propose amendments by a two-thirds vote in both houses or to call a convention when two-thirds of state legislatures apply, and it gives Congress the authority to specify whether ratification will occur by state legislatures or state conventions, leaving certain procedural questions to Congress and, potentially, the courts National Archives overview of the amendment process.
How amendments are proposed: Congress versus an Article V convention
Proposal by two-thirds vote of both Houses
The most commonly used route is for Congress to propose an amendment after a two-thirds vote in both the House and the Senate; once Congress proposes language, it typically sets the ratification method and any time limits for states to act Constitution Annotated on proposal methods.
Yes. Article V provides the constitutional authority to amend the Constitution using two proposal methods and two ratification methods, but successful change requires high thresholds, broad state support, and attention to legal and procedural questions.
State-initiated convention called by Congress
The alternative is an Article V convention, which Article V requires Congress to call when two-thirds of state legislatures apply to Congress for such a convention; this route remains untested in American history and raises open questions about scope, rules for delegates, and procedural control CRS analysis of the Article V convention process and a CRS PDF is also available at congress.gov.
Because an Article V convention has never been used to propose an amendment, legal scholars and the Congressional Research Service identify uncertainties about how a convention would be organized and how its outcomes would be limited or enforced, which is why many observers note that the convention route is legally unsettled and politically complex Legal Information Institute overview of Article V (see the CRS background PDF CRS report PDF).
How amendments are ratified: state legislatures or state ratifying conventions
Three-quarters requirement
After a proposal, the Constitution requires approval by three-quarters of the states for an amendment to take effect; that threshold is met when three-quarters of state legislatures or special state ratifying conventions approve, depending on the mode Congress selects Constitution Annotated on ratification mechanisms.
Congress determines ratification mode
Congress typically specifies whether ratification must occur via state legislatures or state conventions and has in the past set time limits on ratification periods, practices discussed in historical analyses and CRS summaries that show Congress plays a key procedural role after proposing an amendment National Archives overview of ratification options.
Historical examples: how past amendments were proposed and ratified
Examples of fast ratifications
Many amendments have followed the congressional proposal path and then achieved ratification within months or a few years when political support was concentrated; the Constitution Annotated and National Archives provide case-by-case histories showing different routes and speeds for past amendments Constitution Annotated amendment histories.
The 27th Amendment and long delays
The 27th Amendment is a prominent example of very long delay: it was proposed in the 18th century and ultimately ratified centuries later, illustrating that amendment timelines can span extraordinary lengths when state action is protracted or intermittent National Archives on amendment timelines.
The Article V convention: possibilities and legal uncertainties
Why some advocates favor a convention
Some groups favor an Article V convention because it offers a state-driven pathway that could bypass congressional reluctance to propose certain amendments, a political appeal described in CRS and legal summaries of the convention route CRS background on Article V convention advocacy.
Unresolved legal and procedural questions
At the same time, CRS and legal encyclopedia entries stress that an Article V convention raises unresolved questions about the scope of authority delegates would have, the rules governing a convention, and how courts might review disputes, which leaves significant legal uncertainty about how a state-called convention would operate in practice Legal Information Institute survey of Article V legal issues.
Practical steps and political realities: who must act and what they do
State legislatures and applications
Key actors include members of Congress, state legislatures that can apply for a convention, governors who may sign state measures, and citizens and interest groups that organize to urge legislators to act; understanding their roles helps explain why amendments need broad, multi-state coordination to succeed National Archives on roles in the amendment process.
Congress’s procedural role
Congress has procedural authority at multiple stages: it can propose amendments directly, it must call a convention if two-thirds of state legislatures apply, and it generally sets the ratification mode and any time limits, so political strategies must account for congressional decisions as well as state-level action CRS discussion of congressional roles.
Guide researchers to primary amendment sources
Start with primary texts
Public and political mobilization
Because ratifying an amendment requires three-quarters of the states, public campaigns and inter-state coalitions matter; sustained political mobilization over time is often necessary for an amendment to secure the broad support required for ratification National Archives on political coordination for amendments.
Common misunderstandings and pitfalls
Myths about speed and ease
A frequent misconception is that the Constitution can be rewritten quickly; in truth, the amendment process sets high thresholds and many safeguards, and historical cases show long delays are possible, so readers should avoid assuming a rapid route to change Constitution Annotated on amendment thresholds.
Misreading the convention route
Another common error is to assume the Article V convention is a straightforward, clearly governed option; legal analyses stress that because it has never been used, important questions about scope, delegate selection, and enforceability remain unresolved, making predictions about its operation speculative rather than settled CRS review of convention uncertainties.
Timelines and notable cases: from months to centuries
Factors that speed ratification
Amendments that reflect broad national agreement or that follow decisive political events have sometimes moved from proposal to ratification within months or a few years, illustrating how concentrated support can accelerate the process in favorable conditions National Archives examples of ratification timelines.
Factors that slow or halt proposals
Conversely, amendments can stall when political consensus erodes, when states disagree about substance or timing, or when Congress imposes time limits or other conditions, which helps explain long delays like those seen in the 27th Amendment example Constitution Annotated on protracted ratifications.
How courts might resolve disputes about an amendment process
Likely judicial questions
If procedural disputes arise, courts could be asked to decide questions such as whether a state application met legal requirements, how to interpret a convention’s scope, or whether Congress exceeded authority in setting conditions, and CRS notes these judicial questions are plausible in contested cases CRS identification of judicial issues.
Precedent and open areas
While courts have resolved some procedural matters in the past, many areas related to a hypothetical Article V convention remain open and contested in legal literature, so readers should treat court outcomes as uncertain rather than predetermined Legal Information Institute on precedent and open questions.
Decision criteria: when changing the Constitution is realistic
Thresholds and required support
Evaluate a proposed amendment by checking formal thresholds: two-thirds of both congressional houses to propose via Congress or two-thirds of state legislatures to trigger a convention, and three-quarters of states to ratify; these numeric thresholds define the practical difficulty of constitutional change National Archives on formal thresholds. For background on how amendments interact with individual protections, see our constitutional rights hub.
Legal clarity and political feasibility
Consider whether legal questions about a convention route are resolved and whether multi-state political coalitions exist; legal uncertainty lowers feasibility and clear congressional procedures increase it, so both law and politics matter when judging a proposal’s prospects CRS guidance on legal and political feasibility.
Practical scenarios: hypothetical amendment pathways
Path A: Congressional proposal and state ratification
Hypothetical A: Congress drafts and passes an amendment by two-thirds in both houses, specifies ratification by state legislatures, and sets a multi-year window for ratification; states then debate and vote, and if three-quarters approve the amendment becomes part of the Constitution, a straightforward path documented in constitutional summaries Constitution Annotated on congressional proposal path.
Path B: State applications and an Article V convention
Hypothetical B: Two-thirds of state legislatures submit applications calling for a convention; Congress calls the convention as Article V prescribes, delegates convene under rules that would likely be the subject of legal debate, and any proposal emerging from the convention would still require ratification by three-quarters of the states, which means political and legal uncertainties can shape whether such a path succeeds CRS scenario discussion of convention pathway.
Conclusion: what readers should remember about changing the Constitution
Article V provides the clear legal authority to amend the Constitution, with two formal proposal routes and two ratification methods; that framework, explained by the National Archives and the Constitution Annotated, is the primary reference for anyone assessing how a change could occur National Archives overview of Article V and amendments.
Practical reality is that constitutional change requires high thresholds, broad support across many states, and attention to procedural questions that sometimes require congressional action or judicial resolution, so readers should consult the primary sources and legal analyses when evaluating any proposal for a new constitutional text or amendment effort Constitution Annotated and related legal commentary. For a quick guide to where to read the Constitution on this site, see where to read the Constitution.
Article V is the constitutional clause that sets the formal methods to propose and ratify amendments, and it is the legal basis for changing the Constitution.
No. In U.S. history, an Article V convention has not been used to propose an amendment, and legal scholars note significant procedural questions about how one would work.
Three-quarters of the states must approve an amendment, either through their legislatures or through state ratifying conventions, depending on what Congress specifies.
