Colbert, in his trademark sarcastic style, discussed her race on "The Colbert Report," saying, "Holy cow, my sister is running for Congress."

He referred to her as "Lulu," saying that was her childhood nickname.

"No free air time Lulu. As a broadcast journalist I am obligated to maintain pure objectivity. It doesn't matter that my sister is intelligent, hardworking, compassionate and dedicated to the people of South Carolina," he said.

He added, "Besides, I'm not sure I can support her because she's running as a Democrat."

Sixteen Republicans are running for the seat, including former Gov. Mark Sanford and Teddy Turner, the son of business mogul Ted Turner.

"Republicans are all over this election like white on Republicans," Colbert noted.

"At this point I'm leaning toward actual candidate and former governor of the Appalachian Trail — Mark Sanford. I'm a family values conservative, and Mark, he just seems so steady." [...]

Colbert concluded his segment on his sister with this note: "Lulu is kind of tough. She could win this one and, if you do Lulu, I certainly hope you'll sit down with me for a 'Better Know a District,'" referring to a recurring segment from his TV show in which Colbert irreverently interviews House members.

"It will give you a chance to defend some shocking revelations I've found in your middle school diary."