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Gov. Stitt appoints Alan Armstrong to fill open U.S. Senate seat

Armstrong was appointed to the Senate seat and described energy infrastructure as a priority.

Gov. Stitt appoints Alan Armstrong to fill open U.S. Senate seat
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This article1 analysis · Oct 8, 2026
News On 6
Mar 24, 2026
tl;dr

Oklahoma Gov. Kevin Stitt appointed Williams Companies executive chairman Alan Armstrong to fill Markwayne Mullin’s Senate seat until voters choose a senator in November. Armstrong said he plans to pursue energy infrastructure improvements; U.S. Rep. Kevin Hern is also running for the seat.

Community verdict

17 VOTES
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Alan Armstrong R · OK · SEN
● OPEN

People in this story

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Alan Armstrong
R · OK · SEN

Stitt’s appointee to fill Oklahoma’s open U.S. Senate seat

PRIMARY SUBJECT
Kevin Hern
R · OK-1

U.S. representative and candidate for the open Senate seat

Donald Trump
R · President of the United States

President who endorsed Hern and whose DHS decision preceded Mullin’s departure

John Thune
R · SD · SEN

Senate leader consulted by Stitt about the appointment

Martin Heinrich
D · NM · SEN

Senator who voted to confirm Mullin as DHS secretary

John Fetterman
D · PA · SEN

Senator who voted to confirm Mullin as DHS secretary

Kristi Noem
Former U.S. Representative (R-SD)

Former DHS secretary whom Trump decided to replace

Markwayne Mullin
Secretary of Homeland Security
Rand Paul
R · KY · SEN

Senator who voted against Mullin’s confirmation

ALSO MENTIONED  Kevin Stitt, Oklahoma governor who appointed Armstrong; Dustin Hilliary, Early contender who withdrew from consideration; Harold Hamm, Energy executive who was an early contender for the appointment

Part of a bigger story

14 OUTLETS
Oklahoma Governor Appoints Alan Armstrong to Fill U.S. Senate Seat

Oklahoma Gov. Kevin Stitt appointed energy executive Alan Armstrong to replace Markwayne Mullin in the Senate. Armstrong is to serve temporarily while the seat’s next elected senator is determined. Center outlets largely focus on the appointment and interim succession, with some also discussing Armstrong’s political ties, priorities, or reactions to the pick. Right-leaning outlets likewise emphasize the temporary appointment; one report adds Armstrong’s donation to Adam Kinzinger and his limited public profile.

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