OK-SEN: Sen. Alan Armstrong becomes the 11th U.S. senator to announce he won't seek re-election in 2026
Sen. Alan Armstrong (R-Okla.) signed an affidavit on March 24, 2026, stating that he will not run to represent Oklahoma in the U.S. Senate in 2026.
On March 24, 2026, Oklahoma Gov. Kevin Stitt (R) appointed Armstrong to represent the state in the U.S. Senate. Markwayne Mullin (R) previously held the seat before he resigned on March 23, 2026, to serve as the U.S. secretary of homeland security in President Donald Trump’s (R) second term. After Armstrong's appointment, Oklahoma law required him to sign an affidavit stating that he would not run for a full term in the U.S. Senate in 2026.
On his appointment, Armstrong said, “My short time in the Senate will be tightly focused on meaningful permitting reform to get Americans access to whatever affordable energy solutions they choose. Infrastructure is foundational to growing our economy, ensuring American energy independence, and driving innovative solutions that Oklahomans have always delivered.”
As of March 17, 2026, independent race forecasters The Cook Political Report and Inside Elections have rated the 2026 general election for the seat as Solid Republican. Sabato’s Crystal Ball rated it Safe Republican.
https://news.ballotpedia.org/2026/03/30/sen-alan-armstrong-becomes-the-11th-u-s-senator-to-announce-he-wont-seek-re-election-in-2026/