Primaries:
- Congressional and state primaries: Open partisan w/ nonpartisan registration
- Presidential primaries: Open
PRIMARY ELECTIONS STATE BY STATE
Missouri
Registration:
Missouri has nonpartisan registration. There is no option to affiliate with a political party on the voter registration form
Details of state and local primary elections:
- Voters do not declare affiliation with a party in order to vote, but they must choose one party's ballot.
Recent Campaigns & State Partners:
In 2020, Open Primaries endorsed the STL Approves initiative–Prop D for Democracy.
STL Approves Prop D for Democracy passed in overwhelming numbers–getting 68% of the St. Louisan vote! We’re so excited for what this means for St. Louis voters and we’re proud to be a part of this successful campaign.
St. Louis was one of only a few remaining major cities (New York, Philadelphia, Houston, Louisville, Indianapolis, Charlotte, and DC are the others) that conduct partisan municipal elections. Over 80% of cities conduct nonpartisan elections and let all voters vote for whomever they want in both the first and second rounds. Like many cities completely dominated by one party, the only election that counts in St. Louis is the Democratic primary; whomever wins the Democratic Primary is the de facto winner.
STL Approves wanted to change this with a two part campaign. First, end partisan primaries and replace them with an open nonpartisan primary in which all voters vote and all candidates compete. Second, institute approval voting, an innovative form of voting where citizens “approve” of as many candidates as they want. Every voter gets to participate in round one, not just Democrats, and they get to choose from among all the candidates—Democrats, Republicans, Greens and independents. The two candidates who have the most approval advance from the first to the second round. The ultimate winner will have won the broad support of St. Louis voters.
Open Primaries joined local community and civil rights leaders working to empower the marginalized and create a voting system which encourages bridge building and cross-community coalitions. The campaign collected the necessary signatures and was on the November 2020 ballot.
STL Approves Prop D for Democracy passed in overwhelming numbers–getting 68% of the St. Louisan vote! We’re so excited for what this means for St. Louis voters and were proud to be a part of this successful campaign. 
Open Primaries partnered with The People in Missouri–an organization committed to enable everyday Americans to find common ground and take action together to create a more responsive government of, by, and for the people.
Other State Partners: Clean Missouri , Show Me Integrity, Missouri Voter Protection Coaltion