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Updated as of Nov 1, 2026 (CT)
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Oklahoma’s U.S. Senate seat: who serves on which day after the Nov. 3 election
OKLAHOMA — Oklahoma has had an appointed U.S. senator since March. Voters elect a senator on Nov. 3 for the six-year term that begins Jan. 3, 2027. The open question has been who holds the seat in the weeks between. Here is what the law and the attorney general’s opinion say, date by date.[1]
Who holds the seat, by date
| Dates | Who holds the seat | Basis |
|---|---|---|
| Nov. 2022 – Mar. 23, 2026 | Markwayne Mullin | Won a Nov. 8, 2022, special election for the rest of the term James Inhofe won in 2020. That term ends at noon Jan. 3, 2027. Mullin resigned Mar. 23, 2026, to become Secretary of Homeland Security.[1] |
| Mar. 24, 2026 – the day the winner takes the oath | Alan Armstrong (appointed) | Gov. Kevin Stitt appointed him Mar. 24 under 51 O.S. § 10(C), which says the appointee serves “until a successor is elected.” He was sworn in the same day.[1][3] |
| From the winner’s oath to noon Jan. 3, 2027 | The Nov. 3 winner (rest of the current term) | Per AG Opinion 2026-18, applying 26 O.S. § 12-101(C)(3).[1][2] |
| Noon Jan. 3, 2027 onward | The Nov. 3 winner (six-year term) | 2 U.S.C. § 1 and the 20th Amendment set the term start.[1] |
The middle two rows follow the attorney general’s opinion. Armstrong’s lawyers argued for a different reading, described below.
Step-by-step calendar
| Date | What happens |
|---|---|
| Mar. 24, 2026 | Before his appointment, Armstrong filed the oath required by 51 O.S. § 10(D), affirming he would not run for the seat when it next appeared on the ballot. He is not on the Nov. 3 ballot.[1][3] |
| Apr. 1–3, 2026 | Candidate filing. The State Election Board’s terms-of-office schedule listed the seat as a six-year term beginning Jan. 3, 2027, with no separate unexpired term and no special election.[1] |
| Oct. 29, 2026 | AG Opinion 2026-18 answers requests from Gov. Stitt and Senate President Pro Tempore Lonnie Paxton.[1][5] |
| Tue., Nov. 3 | General Election. Polls open 7 a.m. to 7 p.m.[6] |
| Fri., Nov. 6, after 5 p.m. | County election boards send their completed returns for state offices and questions to the State Election Board.[4] |
| Tue., Nov. 10, after 5 p.m. | Under 26 O.S. § 7-136, the State Election Board certifies statewide results after 5 p.m. on the Tuesday after the election.[4] OK Politics Today reports certification is scheduled for Nov. 10.[8] |
| After certification | Per the opinion, the governor must certify the winner to the President of the U.S. Senate “without delay” under 2 U.S.C. § 1a, sending two certificates: one for the unexpired term and one for the six-year term.[1] |
| Date set by the U.S. Senate | The winner takes the oath before the Senate. The opinion sets no date for this. Armstrong’s appointment ends at that oath, per the opinion.[1] |
| Noon, Jan. 3, 2027 | The unexpired term ends and the six-year term begins. The opinion notes a senator elected to both terms takes the oath a second time for the full term.[1] |
What the law says
26 O.S. § 12-101(C)(3), the Senate-vacancy statute, says: “if the vacant office is already scheduled to be filled for a full term at the next available regularly scheduled election, then no special election shall be called. In such case, the candidate elected to the office at the regularly scheduled election shall be deemed to also have been elected to fill the vacancy and shall be eligible to assume the office upon the official certification of the election by the State Election Board.”[2]
26 O.S. § 12-101(C)(2) says that if a vacancy occurs after March 1 of an even-numbered year, “the special election shall be held at the next subsequent regularly scheduled statewide” elections.[2] Mullin resigned March 23.[1]
51 O.S. § 10(C)(1) directs the governor to appoint someone “to serve in such office until a successor is elected.”[3]
The 17th Amendment lets a legislature empower the governor “to make temporary appointments until the people fill the vacancies by election as the legislature may direct.”[1][7]
The two positions, as the opinion describes them
- Counsel for Rep. Kevin Hern, a candidate for the seat, argued that under paragraph 3 the Nov. 3 winner is deemed elected to the vacancy and may take office on certification, ending the appointment then.[1]
- Counsel for Sen. Armstrong said paragraph 3 doesn’t cover a vacancy that opened after March 1, that the Nov. 3 vote fills only the new term, and that Armstrong serves until Jan. 3, 2027.[1]
The opinion’s answer: Paragraph 3 applies because the seat was already on the 2026 ballot for a full term. It reads paragraph 2 as only saying when a special election happens if one is needed, and paragraph 3 as removing the need for one here. It also says 51 O.S. § 10(C), as the more specific and later statute, controls over the general appointee rule in 51 O.S. § 15, which includes an “until the end of the term” clause. And it says the governor must certify the winner and cannot hold that up.[1]
What the opinion leaves open: It says no court has decided the question. It also says the U.S. Senate “remains the judge of the elections, returns, and qualifications of its own members” and that nothing in the opinion binds that body.[1]
Past Oklahoma examples cited in the opinion
- 1994: Jim Inhofe was elected Nov. 8 to David Boren’s unexpired Senate term and took the Senate oath Nov. 30.[1]
- 2018: Kevin Hern was elected Nov. 6 to the U.S. House seat Jim Bridenstine had left. Under the law at the time, Gov. Mary Fallin appointed him to the unexpired term, and he took the House oath Nov. 13.[1]
What the two camps said after the opinion
Hern’s campaign said the opinion “confirms our understanding of Oklahoma law: the winner of the U.S. Senate election in November is eligible to assume office immediately upon certification by the State Election Board.” A spokesperson for Armstrong said, “We are reviewing the Attorney General’s opinion on this complex matter.” Both statements were published by News 9.[9]
The candidates on the Nov. 3 ballot for this seat, as listed by News 9, are Hern (Republican), N’Kiyla Jasmine Thomas (Democrat), Sevier White (Libertarian), and independents Ron Meinhardt and Curtis Stinnett.[9] Facts First makes no prediction about the outcome. Results will appear on our election night page.
About the request letters: the opinion says it answers separate requests from Gov. Stitt and Senate President Pro Tempore Paxton and restates their questions. As of Nov. 1, Facts First could not find either letter posted publicly, so we link the opinion, which quotes the questions.[1]
Sources
- Oklahoma Attorney General, A.G. Opinion 2026-18 (Oct. 29, 2026): oklahoma.gov (PDF)
- 26 O.S. § 12-101, Vacancies in Congress: law.justia.com
- 51 O.S. § 10, Vacancies, appointments and special elections: law.justia.com
- 26 O.S. § 7-136, Canvassing returns: law.justia.com
- Oklahoma Attorney General news release, “Drummond: Nov. 3 winner will fill remainder of U.S. Senate term” (Oct. 29, 2026): oklahoma.gov/oag
- Oklahoma State Election Board, “Tips, Reminders for November 3 General Election” (Oct. 31, 2026): oklahoma.gov/elections; 2026 statutory election dates: oklahoma.gov/elections
- U.S. Constitution, Amendments 11–27 (17th Amendment), National Archives: archives.gov
- OK Politics Today, “AG opinion backs Hern in Senate dispute” (Oct. 2026): okpoliticstoday.com
- News 9, “Armstrong, Hern clash over Oklahoma U.S. Senate transition” (Oct. 29, 2026): news9.com