Darline Graham, sister of late Sen. Lindsey Graham, has been sworn in to finish his term

A separate special election will be held next month to pick a new Republican nominee in the general election for Lindsey Graham’s seat, as he had been seeking a fifth term this year.

Darline Graham, who will be the state’s first female senator, has not previously held public office. She has worked as an optician and at various state agencies, including the South Carolina Commission for the Blind and the Department of Employment and Workforce. She is married to Larry Nordone but will be known in the Senate as Darline Graham, her legal name.

She said on Monday that her older brother, who raised her after their parents died, had always been there for her. “And now, I will be there for him,” she said.

After she was sworn in, Graham walked to her brother's desk and stood behind it as dozens of senators from both parties lined up to shake her hand or give her a hug. She attended the weekly Senate Republican luncheon before the ceremony, where Lindsey Graham's former colleagues told stories about him and welcomed her to the Senate.

Graham, 71, died unexpectedly on Saturday in Washington. A preliminary report from the medical examiner said he suffered a tear in his aorta, known as an aortic dissection.

One of President Donald Trump’s closest allies in the Senate, Graham was the chairman of the Senate Budget Committee and was set to become the top Republican on the Senate Judiciary Committee in the next Congress. Darline Graham will receive her own committee assignments in the coming days.

Graham has often been by her brother’s side

Lindsey Graham, who was not married and did not have children, was exceptionally close to his sister. He became her legal guardian after their parents died, when he was 22 and she was 13. She often appeared at his campaign events and supported him in speeches and campaign ads, and she was there as he filed reelection paperwork earlier this year, along with her children and grandchildren.

“To Lindsey, I miss you more than I can even put into words,” his sister said as McMaster announced her appointment. “But I’m going to do this. I got it.”

McMaster said the two had spoken “in the wee hours of Sunday morning” after Graham’s death, and he asked her to serve.

“I had wondered what you would say, and I was humbled by your quickness to see the duty that you had to serve,” McMaster said. He added that President Donald Trump “thought it was a great idea” when he later told him of his pick. Trump announced his support for Graham to fill the seat earlier Monday.

Senators welcome Darline Graham in the Capitol

The weekly Republican luncheon is generally a serious discussion of the week's agenda. But on Tuesday, Lindsey Graham's colleagues told stories and remembered his sense of humor while welcoming his sister into the fold.

“It's personal for us,” said South Dakota Sen. Mike Rounds, a Republican who sat next to Graham on the Senate floor. He said senators also tried to offer support for Darline Graham, “who has been put in a position of not only losing her closest family member, but then also being asked to step into this role."

Rounds said that Lindsey Graham, who was known for his quick wit, “was a character, and he was the guy that made everybody feel like you were one of his closest friends.”

Several of South Carolina's House members attended the swearing in, lining up in the back of the Senate chamber, as did prominent members of Trump's administration, including Secretary of State Marco Rubio, Treasury Secretary Scott Bessent and special envoy Steve Witkoff. His son-in-law Jared Kushner was also there.

South Carolina holds a special primary in August

According to South Carolina law, a one-week filing period for a special primary election begins on the second Tuesday after the candidate’s death, or July 21.

The special primary election would be held on the second Tuesday after that filing period closes, or Aug. 11. Any necessary runoff would follow two weeks after that, or Aug. 25.

From that point, the new nominee would have just over two months to campaign for the general election on Nov. 3.

Several Republicans are potentially eyeing a run, including Lt. Gov. Pamela Evette and Republican Reps. Russell Fry, Nancy Mace and Ralph Norman.

Associated Press writer Meg Kinnard contributed to this report from Columbia, South Carolina.