Missouri Amendment 6 (2026): What Voters Need to Know : Liberty Alliance USA

Last updated: September 4, 2026

Liberty Alliance recommends voting NO on Amendment 6.

In November 2026, Missouri voters will decide whether to amend the Missouri Constitution through Amendment 6.

Amendment 6 would create an 80% legislative vote requirement before lawmakers could refer changes affecting certain voter-approved measures back to Missouri voters. It would also change Missouri’s ballot language process and apply those new rules to covered voter-approved measures approved on or after January 1, 2010.

Amendment 6 would make certain voter-approved measures much harder to change. Liberty Alliance recommends voting NO because it permanently changes Missouri’s constitutional amendment process in ways that are unusually restrictive and unlike the approach used in other states.

Current Status

Amendment 6 is back on the November 3, 2026 ballot.

Secretary of State Denny Hoskins declared Initiative Petition 2026-106 insufficient on August 4, 2026. The Missouri Supreme Court reversed that decision on September 3 and ordered the Secretary of State to issue a certificate of sufficiency, place the measure on the November ballot, and use the original ballot title certified in September 2025.

The Court did not decide every possible future constitutional objection to Amendment 6. It held that several arguments about what could happen if the amendment passes are not ripe before the election. The Court did reject the pre-election single-subject and single-article objections.

Looking for a printable summary? Download our two-page guide to Missouri Amendment 6, including the ballot title, key provisions, and Liberty Alliance’s recommendation.

Download the Amendment 6 One-Pager (PDF)

Quick Facts

Election: November 3, 2026
Current Status: Ordered onto the November ballot by the Missouri Supreme Court
Recommendation: Vote NO
Type: Constitutional Amendment
Legislative Threshold: 80% vote in both chambers
Retroactive Application: Applies to covered voter-approved measures approved on or after January 1, 2010
Initiative Petition Process: Preserves Missouri’s existing signature requirements

Official Ballot Title

The following ballot title was certified by the Missouri Secretary of State on September 9, 2025. The Missouri Supreme Court ordered Amendment 6 placed on the November 2026 ballot using this original ballot title.

Shall the Missouri Constitution be amended to:

expand the initiative and referendum petition process by making it a fundamental right;

allow courts to revise ballot summaries through lawsuits;

prohibit the legislature from weakening initiative or referendum powers;

prohibit the legislature from changing or repealing laws enacted through the initiative process, or passing laws similar to those rejected by referendum, without approval from at least 80% of both chambers; and

preserve existing majority vote and signature requirements for initiative and referendum petitions?

State and local governmental entities estimate no costs or savings.

What Would Amendment 6 Do?

Amendment 6 makes three changes to Missouri’s constitutional amendment process.

First, it creates an 80% legislative vote requirement before lawmakers could refer changes affecting covered voter-approved measures back to the ballot.

Second, it applies those new rules to covered voter-approved measures approved since January 1, 2010.

Third, it writes new ballot-language rules directly into the Missouri Constitution.

Extraordinary Legislative Threshold

Amendment 6 would require an 80% vote in both chambers before lawmakers could refer changes affecting covered voter-approved measures back to Missouri voters.

Today, that would require 131 members of the Missouri House and 28 members of the Missouri Senate.

Creates one of the highest legislative thresholds identified for comparable voter-approved measures.
Requires overwhelming agreement before voters could reconsider covered measures.
Makes future constitutional changes substantially more difficult.

Liberty Alliance’s review did not identify another state using a comparable 80% legislative threshold for changing covered voter-approved constitutional measures.

Every generation should have the same opportunity to improve Missouri’s Constitution. An 80% threshold makes that substantially more difficult.

Retroactive Application

Amendment 6 would apply its new procedures to covered voter-approved measures approved on or after January 1, 2010.

That reaches back to many of Missouri’s most significant ballot measures from the past fifteen years, including constitutional amendments involving abortion policy, marijuana legalization, Clean Missouri, and more.

For the first time, Missouri would have two amendment processes within one Constitution. Most constitutional provisions would continue under the existing process, while covered voter-approved measures would be subject to a separate and more restrictive set of rules.

Reaches back to measures already approved by Missouri voters.
Uses January 1, 2010 as a permanent dividing line.
Creates different amendment procedures for different parts of the same Constitution.

Liberty Alliance’s review did not identify another comparable state using a similar historical cutoff to decide which voter-approved constitutional provisions receive special procedural protection.

We believe changing the rules after constitutional amendments have already been adopted is bad constitutional policy.

Judicial Rewriting of Ballot Language

Missouri courts already review challenged ballot summaries.

In 2025, the General Assembly passed Senate Bill 22, which included a process giving the Secretary of State additional opportunities to correct challenged ballot language before courts rewrote it. Courts later struck down SB 22 on procedural grounds.

Amendment 6 would move in the opposite direction. It would write judicial authority over ballot summaries directly into the Missouri Constitution.

Protects judicial authority to rewrite ballot summaries.
Limits future legislative changes through ordinary law.
Places these procedures directly into the Constitution.

We believe the rules governing ballot language should remain subject to ordinary law instead of being permanently written into the Constitution.

Missouri voters also deserve access to the full text of proposed constitutional amendments before casting their ballots.

Why Liberty Alliance Opposes Amendment 6

Missouri’s Constitution should be difficult to amend. It should not become uniquely difficult for future generations to revisit.

Amendment 6 creates an extraordinary legislative threshold, applies new procedures to existing voter-approved measures, and writes additional procedural rules into the Constitution.

Every generation should have the same opportunity to improve Missouri’s Constitution.

Missouri Amendment 4 addressed the initiative petition process by asking voters to strengthen the rules for future constitutional amendments. Amendment 6 takes a different approach. It would protect selected past measures from future change by making them far harder to revisit.

Liberty Alliance believes the Constitution should remain accountable to Missouri voters. That’s why we recommend voting NO on Amendment 6.

Frequently Asked Questions

What is Missouri Amendment 6?

Missouri Amendment 6 is a proposed constitutional amendment on the November 2026 ballot. It would create an 80% legislative vote requirement before lawmakers could refer changes affecting certain voter-approved measures, apply those rules to covered measures approved since 2010, and place new ballot language procedures in the Missouri Constitution.

Why should Missouri voters vote NO on Amendment 6?

Liberty Alliance recommends voting NO because Amendment 6 creates an extraordinary 80% legislative threshold, applies new procedures to covered voter-approved measures already approved by Missouri voters, and places additional procedural rules directly into the Missouri Constitution.

What does the 80% vote requirement mean?

Amendment 6 would require support from 80% of both chambers of the Missouri General Assembly before lawmakers could refer changes affecting certain voter-approved measures back to Missouri voters. Today, that would require 131 House members and 28 Senators.

Does Amendment 6 affect existing constitutional amendments?

Yes. Amendment 6 would apply its new procedures to covered voter-approved measures approved on or after January 1, 2010, not just future ballot measures.

Does Amendment 6 repeal Amendment 3?

No. Amendment 6 would not automatically repeal Amendment 3 or any other constitutional amendment. Instead, it changes the process that would apply if lawmakers sought to refer changes affecting covered voter-approved measures back to Missouri voters.

Does Amendment 6 change initiative petition signature requirements?

No. Amendment 6 preserves Missouri’s existing majority vote and signature requirements for initiative and referendum petitions.

What is retroactive application?

Retroactive application means Amendment 6 would apply its new procedures to covered voter-approved measures approved on or after January 1, 2010. That means it affects both future measures and many constitutional amendments already approved by Missouri voters.

How does Amendment 6 change ballot language lawsuits?

Amendment 6 would place judicial authority over ballot summaries directly into the Missouri Constitution, limiting the General Assembly’s ability to change that process through ordinary legislation.

When will Missouri voters decide Amendment 6?

Missouri voters are scheduled to decide Amendment 6 at the November 3, 2026 general election.

Official Documents and Resources

Conclusion

Amendment 6 would permanently change Missouri’s constitutional amendment process. It would create an extraordinary 80% legislative threshold, apply new procedures to covered voter-approved measures approved since 2010, and place additional ballot language rules directly into the Missouri Constitution.

Missouri’s Constitution belongs to the people of Missouri. Every generation should have the same opportunity to shape it.

Amendment 6 would make that substantially more difficult. That’s why Liberty Alliance recommends voting NO.

JOIN LIBERTY ALLIANCEthe Conservative answer that Missouri needs.

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Missouri Amendment 6 (2026): What Voters Need to Know