South Carolina Governor Henry McMaster (R) appointed the sister of the late Sen. Lindsey Graham to fill his vacant U.S. Senate seat Monday [1].
This appointment ensures the state maintains its representation in the Senate during a critical legislative window before a special election determines the long-term successor. The move follows the death of Sen. Graham, who died from an aortic dissection [2].
McMaster announced the decision during a press conference held at 4 p.m. on July 13, 2026 [3]. The selection follows a recommendation from President Donald Trump, who said the sister of Graham should be appointed to the interim position [4].
Under state law, the governor holds the authority to name a replacement to maintain the seat's occupancy [5]. The interim appointment is temporary and will last until the current term expires on Jan. 3, 2027 [6].
To determine the permanent replacement, a special GOP primary is scheduled for Aug. 11, 2026 [7]. The winner of that process will seek to hold the seat beyond the interim period.
While the governor's office manages the formal appointment process, the influence of the presidency in the selection of the interim senator highlights the coordination between state and federal Republican leadership [4], [5].
“Governor Henry McMaster (R) appointed the sister of the late Sen. Lindsey Graham to fill his vacant U.S. Senate seat.”
The appointment of a family member as an interim senator serves as a symbolic gesture of continuity and legacy, while the short duration of the term prevents the appointee from gaining a significant incumbency advantage before the August 11 primary. By aligning the appointment with President Trump's recommendation, Gov. McMaster maintains party unity ahead of the special election.
