Alan Armstrong
Oklahoma Republican Senate nominee?
$75.4K
JUN 17, 2026Primary Election
Party selects its nominee.
Overview
Current roleU.S. Senator
PartyRepublican
Political ideologyTrump-aligned Republican
Age63 years old (Jul 11, 1962)
GenderMale
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LocationOklahoma
BackgroundU.S. Senator (Oklahoma)
EducationUniversity of Oklahoma — B.S., Civil Engineering (1985)
Notable personal detailsAlan Stuart Armstrong is an American businessman and politician serving as the junior United States senator from Oklahoma, appointed in 2026 to fill a vacancy. He spent decades at The Williams Companies (a Tulsa-based energy infrastructure company), serving as president and CEO beginning in 2011 and later as executive chairman. He earned a B.S. in civil engineering from the University of Oklahoma and began his career at Williams as an engineer.
SourcesShowHide
Positions
Economy & Taxes
Advocates pro-business, pro-energy-sector tax policies that favor lower corporate tax burdens and tax provisions such as bonus depreciation while opposing regulatory constraints that raise project costs; identifies as politically conservative but supports maintaining an adequate tax base for government services.
Climate & Energy
Alan Armstrong, as CEO and later executive chairman of Williams Companies, frames natural gas as a key part of a lower-emissions transition while supporting company greenhouse-gas reduction goals and net-zero by 2050 targets. He emphasizes investing in emissions-reduction measures and infrastructure that enable lower-carbon energy while continuing to deploy natural gas to replace higher‑emission fuels and back up renewables.
News
Alan Armstrong has been appointed by Oklahoma Governor Kevin Stitt to fill the U.S. Senate seat left vacant by Markwayne Mullin. He will serve only until a new senator is elected and is not eligible to run for the seat himself. The appointment has drawn attention because some MAGA supporters objected to him, citing past donations to Trump critic Adam Kinzinger. Meanwhile, Republican Rep. Kevin Hern has emerged as the leading candidate for the upcoming election.
Who Is Replacing Markwayne Mullin in the Senate?
What Alan Armstrong’s Senate Appointment Means for Republicans
Oklahoma’s governor picks energy executive Alan Armstrong to fill US Senate seat through end of year
Alan Armstrong tapped by Oklahoma governor to fill Markwayne Mullin's Senate seat
New updates coming soon
We're monitoring and will update when new data impacts the race.
- Polls
- Endorsements
- Fundraising