Lindsey Graham's sister carries on late senator's work, becoming South Carolina's first female senator

Newly minted Sen. Darline Graham, R-S.C., represents a series of firsts for the Senate and for her home state.

Graham, who was sworn in on Tuesday, is the first female senator from the Palmetto State, the first sister ever appointed to the upper chamber and the first person to fill the colossal gap left behind by her late brother, Sen. Lindsey Graham, R-S.C.

"Lindsey has always been there for me, and now I will be there for him," Darline Graham said during her appointment ceremony.