South Carolina U.S. Senator Darlene Graham Nordon confirmed Monday that she will run in the Republican primary to win the seat of her late brother Lindsey Graham.

Nordon's announcement comes after she received an endorsement last week from President Donald Trump, giving her a strong boost ahead of the official filing period for the seat, which begins Tuesday.

In an interview with Fox News, excerpts of which were posted on X, Nordon said, "I'm in the race," adding that her decision to run, along with receiving Trump's endorsement, represents "a tremendous amount of pressure."

She continued: "I still say I prayed a lot and talked a lot with my family, but with my family's love and the support of his (Lindsey Graham's) team, I know I am a hardworking person. I learned that from Lindsey. He cared about the people of this state, and I have worked for nearly 30 years serving its residents."

South Carolina Republican Governor Henry McMaster appointed Nordon last week to temporarily fill the vacant seat following the sudden death of her brother Lindsey Graham.

Nordon has never held elected office and previously worked helping people with disabilities find employment.

The filing period for the special election runs until July 28.

South Carolina Republican voters will cast their ballots in the primary on August 11, with the winner facing Democratic candidate Annie Andrews in the general election scheduled for November.

The winner of the November election will serve the full six-year term for Lindsey Graham's seat.

Republican Congressman Ralph Norman of South Carolina announced his entry into the race on Saturday, and Republican Congressman Russell Fry announced his candidacy on Monday.

In contrast, Republican Congresswoman Nancy Mace announced Monday that she would not enter the race, despite, in her words, "seriously considering" running before Trump endorsed Darlene Graham Nordon.