Overview of the 2018 Missouri Election Cycle
The 2018 general election on November 6, 2018, set the slate of Missouri candidates who would take office in 2019. This profile covers contested statewide races, competitive state legislative districts, ballot measures, and nonpartisan offices decided that cycle. Turnout, filing deadlines, and party nominations shaped the ballot. The following details verified outcomes and offices affected, serving as a durable reference for researchers and voters.
Key Statewide Races and Results
Missouri’s 2018 ballot featured competitive statewide contests, from governor to attorney general. Close margins in several races prompted recounts and official certifications. Outcomes determined party control of state government for the 2019–2023 term. Below is a summary of major offices decided in November 2018.
| Office | Winning Candidate | Party | Margin (approx.) | Notes |
|---|---|---|---|---|
| U.S. Senate | Josh Hawley | Republican | ~371,000 votes | Open seat; defeated Democratic incumbent Claire McCaskill |
| Governor | Mike Parson | Republican | ~54,000 votes | Elevated from lieutenant governor after Eric Greitens resigned |
| Lieutenant Governor | Mike Kehoe | Republican | ~191,000 votes | Elected to first full term |
| Secretary of State | Jay Ashcroft | Republican | ~442,000 votes | Replaced retiring Jason Kander |
| Attorney General | Eric Schmitt | Republican | ~199,000 votes | Succeeded Josh Hawley after Senate election |
| Auditor | Nicole Galloway | Democratic | —Only Democrat to win statewide; reelected | |
| Treasurer | Scott Fitzpatrick | Republican | —Elected after holding appointed role | |
| Insurance Commissioner | Vivek Malek | Republican | —Open seat; Republican win maintained office |
Competitive State Legislative Races
State legislative contests in 2018 determined partisan balance in Jefferson City. Democrats made gains in the Missouri House, narrowing Republican supermajorities, while Republicans held the Senate. Third-party and independent candidates appeared on few general election ballots. Competitive districts were typically suburban or urban swing seats with modest margins.
Missouri House of Representatives
All 163 House seats were up in 2018 following redistricting. Democrats needed a net gain of roughly 6–7 seats to flip the chamber but fell short, narrowing the majority. Key battlegrounds included districts in St. Louis, Kansas City, and the Columbia area. Incumbency advantage and legislative maps influenced outcomes.
Missouri Senate
The 17 even-numbered Senate districts elected one senator each in 2018. Republicans retained control with a narrower margin than prior cycles. A handful of districts decided races by single digits, attracting outside spending and national attention. Those seats remain reference points for subsequent cycle modeling.
Ballot Measures and Constitutional Amendments
Missouri voters in 2018 considered multiple ballot measures covering ethics, taxes, and labor policy. Measures required petition circulation and survived legal challenges before reaching the ballot. Certified summaries informed voters, though some language was revised after litigation. Outcomes influenced state policy and budgeting through 2020.
- Amendment 1 (Clean Missouri): Redistricting and lobbying reforms; voter approval.
- Amendment 2: Medicaid expansion under federal ACA; voter approval with work requirements.
- Amendment 3: Changes to tobacco tax and permit processes; voter approval.
- Proposition A (Right-to-Work): Rejected; would have limited union fees.
Nonpartisan and Local Offices
Beyond partisan contests, Missouri ballots included judgeships, school board seats, and municipal elections. Nonpartisan judicial retention questions asked voters to evaluate performance without party labels. Local school measures addressed funding, facilities, and transportation. These offices often decide services and budgets at the county and municipal level.
Where to Find Official Sources and Records
For verifiable candidate, financial, and results data, consult state and federal sources maintained for public record. Filing deadlines, donation limits, and disclosure rules are documented by regulators. The following table directs readers to primary records used for this profile.
| Record Type | Verified Source | Typical Access Method |
|---|---|---|
| Candidate Filings | Missouri Secretary of State Candidate Filings | Online portal; search by name or cycle |
| Campaign Finance Reports | Missouri Ethics Commission (CAMP) | Downloadable datasets; contribution details |
| Election Results | Missouri State Election Night Reporting | County-level results; certification PDFs |
| Ballot Measures | Missouri Secretary of State Ballot Measures | Text, summaries, and vote totals |
| Legislative District Maps | Missouri General Assembly Redistricting | Adopted plan PDFs and interactive maps |
| Official Results Certification | Missouri State Auditor & County Boards of Elections | Final certificates; public records requests |
Context and Legacy of the 2018 Cycle
Turnout in 2018 was higher than midterm baselines but below presidential years. Issues including Medicaid expansion, ethics reform, and economic policy drove mobilization. Maps, filing rules, and candidate recruitment evolved ahead of 2020. Understanding 2018 races clarifies baseline expectations for subsequent cycles and helps contextualize current officeholder backgrounds and institutional dynamics.
Additional Considerations for Researchers
When reviewing historical data, note that party labels, candidate names, and offices evolve through appointments and special elections. Independent expenditures and outside groups influenced some races without candidate control. District boundaries adopted in 2022 changed the competitive landscape, so direct comparisons to later cycles require caution.