2022Final resultsSpecial election
2022 special election for U.S. Senate in Oklahoma
U.S. Senate · Oklahoma
Markwayne Mullin (R) won with 61.8% of the vote, defeating Kendra S. Horn (D) by 26.5 points.
Markwayne MullinRepublican · winner
61.8%710,643
Kendra S. HornDemocrat
35.2%405,389
Robert MurphyLibertarian
1.5%17,386
Ray WoodsIndependent
1.5%17,063
1,150,481 votes
Source: MIT Election Data and Science LabUpdated Oct 2, 2026, 5:14 AM ET
The seat over time
D − R margin in this seat's races around 2022
Races before and after
Source: MIT Election Data and Science LabUpdated Oct 2, 2026, 5:14 AM ET
Money in this race
Each line compares the two campaigns on one scale.
Kendra S. HornMarkwayne Mullin
$1.9M
Raised by the campaign
$5.6M
$2M
Spent by the campaign
$6.1M
$24.6K
Cash on hand
$55K
Campaign money: FEC, through Dec 31, 2022.
Source: FEC campaign filingsUpdated Dec 31, 2022
The candidates
Markwayne Mullin (R)Kendra S. Horn (D)
Also on the ballot: Robert Murphy (Libertarian), 1.5%; Ray Woods (Independent), 1.5%