The following is a list of statewide initiatives and referenda modifying state law and proposing state constitutionalamendments in Missouri, sorted by election.
2000s[]
2004[]
August 2004 primary
Proposal
Passed
YES votes
YES %
NO votes
NO %
Description
Amendment 2
Yes
1,055,771
70.61%
439,529
29.39%
prohibited same-sex marriages from being recognized in Missouri.
2006[]
November 2006 general election
Proposal
Passed
YES votes
YES %
NO votes
NO %
Description
Amendment 2
Yes
1,085,396
51.2%
1,034,596
48.8%
Missouri Stem Cell Research and Cures Initiative. Allows any stem cell research and therapy in the U.S. state of Missouri that is legal under federal law, including somatic cell nuclear transfer to produce human embryos for stem cell production. It prohibits cloning or attempting to clone a human being.
2010s[]
2018[]
August 2018 primary
Proposal
Passed
YES votes
YES %
NO votes
NO %
Description
Proposal A
No
453,283
32.53%
939,973
67.47%
Senate Bill 19, which would enact a right-to-work law
November 2018 general election
Proposal
Passed
YES votes
YES %
NO votes
NO %
Description
Amendment 1
Yes
1,469,093
62.02%
899,613
37.98%
Lobbying, Campaign Finance, and Redistricting Initiative.
Amendment 2
Yes
1,583,227
65.59%
830,631
34.41%
Medical Marijuana and Veteran Healthcare Services Initiative. Would legalize marijuana for medical purposes, tax sales at 4 percent, and redistribute revenue to healthcare services, job training, housing assistance, and other services for veterans
Amendment 3
No
754,007
31.50%
1,639,622
68.50%
Medical Marijuana and Biomedical Research and Drug Development Institute Initiative. Would legalize marijuana for medical purposes, tax sales at 15 percent, and redistribute revenue to the creation of a Biomedical Research and Drug Development Institute
Yes
No