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Missouri state legislative Republican primaries, 2018

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2018 Missouri
General Assembly elections
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GeneralNovember 6, 2018
PrimaryAugust 7, 2018
2018 elections
Choose a chamber below:


The Republican primary elections for seats in the Missouri State Senate and Missouri House of Representatives were on August 7, 2018. For information about the Democratic primary elections in Missouri, click here.

The general election was on November 6, 2018. The candidate filing deadline was March 27, 2018. In the state Senate, 17 of 34 seats were up for election. In the state House, all 163 seats were up for election.

HIGHLIGHTS
  • As of November 2017, Missouri was one of 26 Republican trifectas. A state government trifecta is a term used to describe a single-party government where one political party holds the governor's office and a majority in both chambers of the state legislature. To find out more about state government trifectas, click here.

    • Incumbents who did not advance to the general election

    Retiring incumbents

    Eight Republican state Senate incumbents did not file for re-election.

    Forty Republican state House incumbents did not file for re-election.

    Incumbents defeated

    No Republican incumbents were defeated.

    Competitiveness

    See also: 2018 primary election competitiveness in state and federal government and Missouri state legislative Democratic primaries, 2018

    There were 60 open seats in 2018 compared to 40 in 2016 and 29 in 2014. Eighty-four more candidates filed to run in 2018 than 2016. Compared to 2014, 114 more candidates filed to run. There were 32 contested Democratic primaries compared to 25 in 2016 and 16 in 2014. There were 50 contested Republican primaries compared to 33 in 2014 and 2016.

    Year Total seats Open seats Total candidates Democratic primaries contested Republican primaries contested Total contested Incumbents contested in primaries Total incumbents contested in primaries
    2018 180 60 446 32 50 22.8% 22 18.3%
    2016 181 40 362 25 33 16.0% 21 14.9%
    2014 180 29 332 16 33 13.6% 21 13.9%

    Partisan control

    The tables below show the partisan breakdowns of the Missouri House of Representatives and the Missouri State Senate as of August 2018:

    Missouri House of Representatives

    Party As of August 2018
         Democratic Party 46
         Republican Party 112
         Vacancies 5
    Total 163

    Missouri State Senate

    Party As of September 2025
         Democratic Party 8
         Republican Party 24
         Vacancies 2
    Total 34

    Voter information

    How the primary works

    A primary election is an election in which registered voters select a candidate that they believe should be a political party's candidate for elected office to run in the general election. They are also used to choose convention delegates and party leaders. Primaries are state-level and local-level elections that take place prior to a general election. Missouri utilizes an open primary system, in which registered voters do not have to be members of a party to vote in that party's primary.[7][8][9]

    For information about which offices are nominated via primary election, see this article.

    Poll times

    In Missouri, all polling places are open from 6:00 a.m. to 7:00 p.m. Central Time. An individual who is in line at the time polls close must be allowed to vote.[10]

    Registration requirements

    Check your voter registration status here.

    To vote in Missouri, one must be 18 years old, a United States citizen, and Missouri resident.[11] An applicant may print an application, pick one up from a county clerk's office, or request that an application be mailed. The completed application must be returned by mail. All returned applications must be postmarked at least 27 days prior to Election Day in order to be processed. An applicant may also register to vote online.[11]

    Automatic registration

    Missouri does not practice automatic voter registration.[12]

    Online registration

    See also: Online voter registration

    Missouri has implemented an online voter registration system. Residents can register to vote by visiting this website.[12]

    Same-day registration

    Missouri does not allow same-day voter registration.[12]

    Residency requirements

    To register to vote in Missouri, you must be a resident of the state. State law does not specify the length of time for which you must have been a resident to be eligible. Voters may file change-of-address forms after the registration deadline, up to and including Election Day, provided that they can present photo identification upon doing so.[13][14]

    Verification of citizenship

    See also: Laws permitting noncitizens to vote in the United States

    Missouri does not require proof of citizenship for voter registration. An individual applying to register to vote must attest that they are a U.S. citizen under penalty of perjury.[11]

    All 49 states with voter registration systems require applicants to declare that they are U.S. citizens in order to register to vote in state and federal elections, under penalty of perjury or other punishment.[15] Seven states — Alabama, Arizona, Georgia, Kansas, Louisiana, New Hampshire, and Wyoming — have laws requiring verification of citizenship at the time of voter registration, whether in effect or not. In three states — California, Maryland, and Vermont — at least one local jurisdiction allows noncitizens to vote in some local elections. Noncitizens registering to vote in those elections must complete a voter registration application provided by the local jurisdiction and are not eligible to register as state or federal voters.

    Verifying your registration

    The Missouri Secretary of State's office allows residents to check their voter registration status online.


    Voter ID requirements

    Missouri requires voters to present photo identification while voting.[16][17]

    The following were accepted forms of identification as of April 2023. Click here for the Missouri Secretary of State's page on accepted ID to ensure you have the most current information.

    Voters can present the following forms of information:

    • A nonexpired Missouri driver or non-driver license;
    • A nonexpired military ID, including a veteran’s ID card;
    • A nonexpired United States passport; or
    • Another photo ID issued by the United States or the state of Missouri which is either not expired or expired after the date of the most recent general election.

    If a voter does not have an ID, he or she can obtain one for free by filling out this form.

    Early voting

    Missouri permits early voting. Learn more by visiting this website.

    Early voting permits citizens to cast ballots in person at a polling place prior to an election. In states that permit no-excuse early voting, a voter does not have to provide an excuse for being unable to vote on Election Day. States that allow voters to cast no-excuse absentee/mail-in ballots in person are counted as no-excuse early voting states.

    Forty-seven states and the District of Columbia permit no-excuse early voting.

    Absentee voting

    A voter is eligible to vote absentee in an election if he or she cannot make it to the polls on Election Day for one of the following reasons:[18]

    • The voter will be absent from his or her regular polling place on Election Day.
    • The voter is incapacitated or confined due to illness or physical disability. Additionally, an individual who is caring for an incapacitated person may vote absentee.
    • The voter is unable to visit the polls for religious reasons.
    • The voter is employed by an election authority.
    • The voter incarcerated but has retained voting qualifications.
    • The voter is unable to visit the polls because of safety concerns.

    To vote absentee, an application must be received by 5 p.m. on the Wednesday prior to the election. If returned in person, the ballot must be submitted by 5 p.m. the day before the election. If submitted by mail, the ballot must be received by the close of polls on Election Day.[18]


    See also

    Footnotes

    1. ↑ Kehoe was appointed as lieutenant governor in June 2018.
    2. ↑ Silvey was appointed to the Missouri Public Service Commission in January 2018.
    3. ↑ Cierpiot was elected to the Missouri Senate in November 2017.
    4. ↑ Alferman resigned in June 2018.
    5. ↑ Brown died in March 2018.
    6. ↑ Rhoads resigned in June 2018.
    7. ↑ NCSL,"State Primary Election Types," accessed April 4, 2023
    8. ↑ Ballotpedia research conducted December 26, 2013, through January 3, 2014, researching and analyzing various state websites and codes.
    9. ↑ John R. Ashcroft Missouri Secretary of State,"Frequently Asked Questions," accessed April 4, 2023
    10. ↑ Missouri Secretary of State - Elections and Voting, "Frequently Asked Questions," accessed April 4, 2023
    11. ↑ 11.0 11.1 11.2 Missouri Secretary of State, "Register to Vote," accessed April 4, 2023
    12. ↑ 12.0 12.1 12.2 NCSL, "State Profiles: Elections," accessed August 27, 2024
    13. ↑ BillTrack50, "MO HB1878," accessed April 4, 2023
    14. ↑ Missouri Secretary of State, "FAQs Voter Registration," accessed August 27, 2024
    15. ↑ Under federal law, the national mail voter registration application (a version of which is in use in all states with voter registration systems) requires applicants to indicate that they are U.S. citizens in order to complete an application to vote in state or federal elections, but does not require voters to provide documentary proof of citizenship. According to the U.S. Department of Justice, the application "may require only the minimum amount of information necessary to prevent duplicate voter registrations and permit State officials both to determine the eligibility of the applicant to vote and to administer the voting process."
    16. ↑ Missouri Secretary of State, "How To Vote," accessed August 27, 2024
    17. ↑ Missouri Secretary of State, "Do I need an ID to vote?" accessed April 3, 2023
    18. ↑ 18.0 18.1 Missouri Secretary of State, "Request for Missouri Absentee Ballot," accessed April 4, 2023
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