Three days after Lindsey Graham died, his younger sister Darline Graham took the oath to hold his seat until his term ends in January.

© Alex Kent/The New York Times

A lot of things have changed in American politics since our writer went on parental leave.

© Tierney L. Cross for The New York Times

Gov. Henry McMaster of South Carolina named Darline Graham Nordone to replace Mr. Graham, who died on Saturday.

© SCETV, via Associated Press

After the senator and his sister, Darline, lost their parents, he guided her through the teenage years and into college. He called her success the highlight of his life.

© Justin Sullivan/Getty Images