Darline Graham Nordone, the sister of the late Sen. Lindsey Graham, will be sworn into the U.S. Senate on Tuesday afternoon after South Carolina Gov. Henry McMaster appointed her to complete her brother's term through the end of the year.

The appointment, which President Trump publicly recommended Monday morning and McMaster announced hours later at the state Capitol in Columbia, restores the 53-47 Republican majority that had narrowed with Graham's sudden death Saturday. Graham Nordone's tenure will run until Jan. 3, when a new Congress convenes and the winner of the November election takes the seat. That gives South Carolina Republicans less than four weeks to sort out a crowded primary field ahead of an Aug. 11 vote to pick the party's nominee for the full six-year term.

The appointment

"Lindsey took care of his little sister in years long departed. It's my honor to ask his little sister Darline Graham to finish his work for him now," McMaster said at Monday's news conference.

Graham Nordone, standing at the same podium, called the role "a privilege to get to finish some of his important work" and said her brother "dedicated his life to this country." She has never held elected office and works helping people with disabilities find jobs. Graham — who never married and had no children — legally adopted her after their parents died within 15 months of each other; he was 22 and she was 13.

Sen. Tim Scott (R., S.C.), now the state's senior senator, endorsed the pick on X on Monday. Trump, in a Truth Social post earlier the same morning, wrote: "I recommended, to Governor Henry McMaster, Lindsey Graham's wonderful sister, Darline, to serve as interim Senator from the Great State of South Carolina. This would be a fabulous tribute to Lindsey, who loved her dearly!"

What she inherits

Graham Nordone joins a chamber where her brother's desk — inherited from his close friend, the late Sen. John McCain — sat draped in a black veil Monday, the Senate's first day back after the Fourth of July recess. Majority Leader John Thune (R., S.D.) said in a tribute that the "halls of the Senate already feel empty without him." Thune's office set the swearing-in for Tuesday at 2:30 p.m. Eastern.

She arrives with Sen. Mitch McConnell (R., Ky.), who disclosed pneumonia and a fall on Sunday, still not expected back on the floor. Restoring even a nominal 53-47 margin matters for the leadership's July docket, which includes judicial confirmations and a stalled election-integrity bill.

The August primary

The longer-term fight over the seat is the more consequential one. Under South Carolina law, the winner of an Aug. 11 special Republican primary will replace Graham on the November ballot and face Democrat Annie Andrews. The Cook Political Report with Amy Walter rates the November race "Solid R."

Reps. Nancy Mace and Ralph Norman, both of whom mounted failed gubernatorial bids earlier this year, have said they may run. Rep. William Timmons, in a Sunday X post, did not rule out a bid. Reps. Russell Fry and Joe Wilson have also been floated as potential candidates. Lt. Gov. Pamela Evette, whom Trump backed in her own losing bid for governor, could enter the race. McMaster, term-limited at the end of the year, has himself been mentioned as a long-term successor.

The unresolved question

Absent from the tributes is a question McMaster and Graham Nordone declined to answer Monday: whether she will herself run for the full six-year term. Sen. Tommy Tuberville (R., Ala.), who recounted Graham's final phone call for reporters Monday, said that "Lindsey basically worked himself to death, most of us have families, he didn't have any family" — a framing Fox News foregrounded alongside the appointment story. For the state Republican Party, the immediate question is whether an interim senator carrying the Graham name, but no political résumé, can, or should, run against half a dozen sitting Republican House members. No one in the field has publicly urged her to enter the primary, and no one has publicly urged her not to.

Graham Nordone takes the oath Tuesday at 2:30 p.m. Eastern. The Aug. 11 Republican primary is 28 days later.