kalshiApril 7, 20262h agoConstitutional Amendment Passed 2025-2029
Will a constitutional amendment be ratified between 2025 and 2029?
Signal
SELL
Probability
2%
Confidence
HIGH
82%
Summary.
My estimated probability for a constitutional amendment ratification between 2025-2029 is approximately 2-3%, reflecting the extraordinarily high procedural barriers and compressed timeline. As of April 7, 2026, only 3.75 years remain in the resolution window. The most prominent candidate—the Equal Rights Amendment—is disqualified even if court litigation succeeds, because its official ratification date would be 2020 (when Virginia became the 38th state), falling outside the 2025-2029 window. No current congressional proposal shows momentum toward the required two-thirds supermajority in both chambers amid severe political polarization. Convention of States efforts have reached only 20 of the 34 states needed to call an Article V convention, and even if successful, the process would need to complete proposal and 38-state ratification by December 2029—an unprecedented timeline. Historical precedent strongly supports this low probability: only 2 amendments have been ratified in the past 56 years, and no modern amendment has been both proposed and ratified within a 5-year window. The Article V process is deliberately designed to be extremely difficult, requiring supermajorities that are nearly impossible in today's polarized environment.
Reasoning.
Step-by-step probability analysis:
1. Base Rate Analysis (Starting Point) The historical base rate is instructive but must be contextualized:
- Modern era (post-1970): Only 2 amendments ratified in 56 years = 0.036 per year
- For a 5-year window: ~0.18 expected amendments (modern rate)
- However, the 27th Amendment (1992) was anomalous—proposed in 1789, it took 203 years
- No amendment in modern history has been both proposed AND ratified within 5 years
2. Current Pathways Assessment (as of April 7, 2026)
Pathway A: Equal Rights Amendment (ERA)
- Critical disqualifying factor: Even if courts rule favorably and the Archivist certifies the ERA, the official ratification date would be 2020 (when Virginia became the 38th state)
- This falls OUTSIDE the 2025-2029 window required for YES resolution
- ERA litigation is ongoing but legally cannot contribute to a YES outcome for this bet
- Probability contribution: 0%
Pathway B: Congressional Proposal Route (Article V, Method 1)
- Requires 2/3 vote in BOTH chambers (290 House, 67 Senate)
- Current environment: Severe polarization makes bipartisan supermajorities nearly impossible
- Proposed amendments (judicial term limits, campaign finance, congressional pay, presidential terms) show no evidence of approaching 2/3 support
- Even if Congress passed something today, 38 states would need to ratify within ~3.75 years remaining
- Historical precedent: Ratification processes typically take years to decades
- Probability contribution: ~1-2%
Pathway C: Article V Convention (Method 2)
- Convention of States: 20 of 34 states needed (59% progress)
- Term Limits Convention: 13-15 of 34 states (38-44% progress)
- Convention has NEVER been successfully called in U.S. history
- Even if called in 2026-2027, would need to propose amendment, then get 38 state ratifications by Dec 2029
- Timeline is extraordinarily compressed
- Opposition concerns about "runaway convention" slow progress
- Probability contribution: ~1%
3. Black Swan Scenarios
- Major crisis (war, economic collapse, democratic emergency) that creates unusual consensus
- Supreme Court ruling that catalyzes immediate amendment response
- Historical precedent: Even major crises (9/11, 2008 financial crisis, COVID) didn't produce amendments
- Probability contribution: <1%
4. Time Constraint Severity Only 3.75 years remain (April 2026 to December 2029). The fastest modern amendment (26th Amendment, 1971) took 100 days from congressional passage to ratification, but that had unique circumstances (18-year-old voting rights during Vietnam War with broad consensus). No current proposal has remotely similar momentum.
5. Synthesis
- ERA pathway: 0% (disqualified by timeline technicality)
- Congressional route: 1-2% (polarization + time constraint)
- Convention route: ~1% (never successful + compressed timeline)
- Black swan: <1%
Combined estimate: ~3% (accounting for some pathway overlap and unknown unknowns)
This reflects the extraordinarily high bar set by Article V, modern political polarization, the compressed timeline, and the complete absence of any amendment proposal with visible momentum toward supermajority support.
Key Factors.
Article V supermajority requirements: 2/3 of Congress (or 34 states for convention) + 3/4 of states (38) to ratify
Severe political polarization making bipartisan 2/3 votes nearly impossible in current Congress
Compressed timeline: only 3.75 years remaining from April 2026 to December 2029
ERA disqualification: even if validated by courts, official ratification date is 2020 (outside bet window)
Historical base rate: only 2 amendments in last 56 years; none proposed and ratified within 5 years in modern era
Convention of States at 20/34 states (59% progress) with no path to completion visible
Zero current congressional proposals showing momentum toward 2/3 support threshold
Amendment process deliberately designed to be extremely difficult and slow-moving
Scenarios.
Base Case: No Amendment Ratified
97%No constitutional amendment achieves both congressional/convention proposal and 38-state ratification between now and December 31, 2029. Political polarization prevents 2/3 congressional votes. Article V conventions fail to reach 34-state threshold or cannot complete ratification process in time. ERA litigation results either in rejection or certification with 2020 ratification date (outside bet window).
Trigger: Current trajectory continues. Congressional amendment proposals remain below 50% support in either chamber. Convention of States progress stalls below 30 states. ERA court cases either rule against validity or Archivist certifies with 2020 date. No major crisis creates cross-partisan consensus.
Bull Case: Rapid Congressional Amendment
2%A narrow-scope, politically unifying amendment (e.g., congressional term limits, judicial term limits, or technical governance reform) gains unexpected bipartisan momentum in 2026-2027. Passes both chambers with 2/3 vote and achieves rapid state ratification by 38+ states before end of 2029. Requires issue that transcends partisan divide and has broad public support.
Trigger: Major corruption scandal or institutional crisis creates demand for structural reform. Public pressure (70%+ polling) forces congressional action. Amendment proposal reaches floor votes in both chambers by late 2026. Swift ratification campaigns in states with fast legislative processes. 38 states ratify within 18-24 months (similar to 26th Amendment speed).
Dark Horse: Article V Convention Success
1%Convention of States or Term Limits convention reaches 34-state threshold in 2026-2027, successfully convenes, proposes a limited amendment that avoids 'runaway convention' fears, and secures 38-state ratification by late 2029. Would be first successful use of Article V convention method in U.S. history.
Trigger: 4-6 additional states pass Convention of States resolutions in 2026-2027 (reaching 34). Convention convenes and stays focused on narrow mandate. Proposed amendment has >65% public support across partisan lines. States ratify at accelerated pace (potentially in special sessions). Process completes by Q4 2029.
Risks.
Black swan unifying crisis (major war, constitutional crisis, SCOTUS legitimacy collapse) could create unexpected consensus for rapid amendment
Underestimating Convention of States momentum—social movements can accelerate faster than linear projections suggest
ERA litigation wild card: novel legal ruling could create unpredicted pathway (though 2020 ratification date issue remains)
Research data gaps on state-level legislative dynamics and specific amendment polling support
Article V convention has never been used—uncertainty about actual process and timeline if triggered
Potential for narrow, technical amendment (e.g., budget process reform) that flies under radar but gains consensus
Time remaining (3.75 years) is longer than it seems—sufficient for determined effort if political will materializes
Overconfidence in status quo: amendment process has succeeded 27 times historically, including recent 1992 ratification
Edge Assessment.
No market odds provided for comparison.
My estimated probability is 3%.
If I encountered market odds implying >10% probability, I would assess significant value on the NO side. The structural barriers (Article V supermajorities, polarization, time constraint, ERA timeline disqualification) are extremely high.
Conversely, if market odds were <1%, there might be slight value on YES given the black swan possibility of a unifying crisis or unexpected Convention of States acceleration.
The historical base rate (0.7% annual probability in modern era) suggests even 3% for a 5-year window may be slightly generous, but I'm accounting for multiple parallel pathways and the non-zero possibility of rapid political change.
Recommendation: Without market odds, this analysis suggests TRUE probability is in the 2-5% range. Any market pricing this above 8-10% would represent a strong NO opportunity. Markets pricing below 1% might offer marginal YES value for tail-risk exposure.
What Would Change Our Mind.
Any congressional amendment proposal reaching floor votes in both chambers with visible bipartisan support approaching 60%+ (indicating potential path to two-thirds)
Convention of States or Term Limits convention reaching 30+ states (showing realistic path to 34-state threshold)
Major unifying crisis event (e.g., constitutional legitimacy crisis, foreign attack, institutional collapse) creating unprecedented cross-partisan consensus for reform
ERA court ruling with novel legal interpretation that enables certification with a 2025+ effective date (currently appears legally impossible)
Rapid ratification of any proposed amendment by 20+ states within a 6-month period (indicating unusual momentum)
Bipartisan congressional leadership publicly committing to fast-track a specific amendment with documented vote-counting showing two-thirds support
Public polling showing 75%+ support for a specific amendment across all demographic and partisan groups (pressure that could force congressional action)
Sources.
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